Journal of Functional Morphology and Kinesiology

15 pages, 2649 KB

Open AccessArticle

Assessment of Static Balance with and Without Cognitive Dual Task in Children with Haemophilia: A Cross-Sectional Study

by Ana Chimeno-Hernández, Pilar Alberola-Zorrilla, Jorge Martín Campos, Juan J. Carrasco, Sofía Pérez-Alenda, Daniel Sánchez Zuriaga and Marta Aguilar-Rodríguez

J. Funct. Morphol. Kinesiol. 2026, 11(1), 67; https://doi.org/10.3390/jfmk11010067 - 6 Feb 2026

Abstract

Background: Balance is an essential motor skill that enables individuals to maintain a stable posture and perform daily activities safely. Dual-task assessments are widely used to evaluate the integration of motor and cognitive functions in paediatric populations, but their effects on postural control [...] Read more.

Background: Balance is an essential motor skill that enables individuals to maintain a stable posture and perform daily activities safely. Dual-task assessments are widely used to evaluate the integration of motor and cognitive functions in paediatric populations, but their effects on postural control in children with haemophilia (CwH) remain poorly understood. The objective was to analyse and compare static balance performance under single-task and cognitive dual-task conditions between CwH and age-matched healthy controls (HC). Methods: This comparative cross-sectional study included 34 CwH and 32 HC aged 8–12 years. Balance was assessed using the Wii Balance Board^® under six conditions: bipedal, bipedal with cognitive task, and dominant and non-dominant unipedal (with and without cognitive task). Primary outcome variables included overall stability index, total velocity, and sway area. Physical activity habits were also recorded in both groups with an ad hoc questionnaire. Among CwH, joint health was measured with the Haemophilia Joint Health Score (v2.0), and joint effusion/synovial hypertrophy was evaluated by ultrasound. Results: CwH showed significantly poorer performance in all variables, primarily under unipedal dominant/non-dominant dual-task conditions (p < 0.05) with percentage differences ranging from approximately 15% to over 60%. CwH reported lower-intensity and shorter-duration physical activity than HC. Conclusions: CwH demonstrates impaired balance, especially under unipedal and cognitive demands. Assessment of balance alongside dual-task performance may help detect subtle deficits not captured by only static balance assessment. These findings may suggest the incorporation of dual-task training into balance training programmes for this population. Full article

(This article belongs to the Section Kinesiology and Biomechanics)

16 pages, 814 KB

Open AccessReview

Prevalence and Risk of Carpal Tunnel Syndrome in Parkinson’s Disease: A Systematic Review and Meta-Analysis

by Amir N. Attia, Kareem Wael Raafat, Mohamed R. Ezz, Ehab Naser Sabry, Mariam M. Mohammed, Ahmed M. Amin, Mohamed S. Syed, George M. Pamboris, Spyridon Plakias, Frederic Viseux and Ismail A. Ibrahim

J. Funct. Morphol. Kinesiol. 2026, 11(1), 66; https://doi.org/10.3390/jfmk11010066 - 2 Feb 2026

Viewed by 183

Abstract

Background: Parkinson’s disease (PD) is a progressive neurodegenerative disorder characterised by motor and non-motor symptoms. Several studies have reported varying prevalence of Carpal Tunnel Syndrome (CTS) among individuals with PD. Objective: This study aimed to estimate the pooled prevalence of CTS [...] Read more.

Background: Parkinson’s disease (PD) is a progressive neurodegenerative disorder characterised by motor and non-motor symptoms. Several studies have reported varying prevalence of Carpal Tunnel Syndrome (CTS) among individuals with PD. Objective: This study aimed to estimate the pooled prevalence of CTS in people with PD and explore any potential association between the two conditions. Methods: This systematic review and meta-analysis was conducted and reported in accordance with the PRISMA 2020 guidelines. A systematic search was performed across PubMed, the Cochrane Central Register of Controlled Trials (CENTRAL), Web of Science (WoS), Scopus, and EMBASE from inception to April 2024. Studies reporting CTS prevalence data in individuals with PD were included. Methodological quality was assessed using the National Institutes of Health (NIH) quality assessment tool. Pooled prevalence estimates were calculated using a random-effects model. Risk difference (RD) and risk ratio (RR) were calculated to assess the association between PD and CTS compared with control groups. Results: A total of 7 studies involving 411 participants (343 with PD and 68 controls) met the inclusion criteria, with 679 wrists assessed. The pooled prevalence of CTS in PD was estimated at 15% (95% CI: 0.07–0.28) with significant heterogeneity (p < 0.001, I² = 91%). The RD was 10% (95% CI: 0.04–0.16, p = 0.002), with low heterogeneity (p = 0.29, I² = 19%). The RR of CTS in PD compared with controls was 3.31 (95% CI: 0.60–18.42, p = 0.17), with moderate heterogeneity (p = 0.13, I² = 52%). Conclusions: This meta-analysis provides preliminary pooled estimates indicating a potentially increased prevalence of carpal tunnel syndrome in individuals with PD. Although the findings suggest a possible association, clinicians should maintain increased vigilance for CTS symptoms in patients with PD presenting with upper-limb sensory or motor complaints. From a biomechanical and functional perspective, these findings highlight the importance of routine upper-limb screening and the implementation of rehabilitation strategies targeting hand use, dexterity, and sensorimotor control within physiotherapy practice. Further high-quality studies with larger, well-characterised samples are required to confirm this relationship and clarify its clinical and functional implications. Full article

(This article belongs to the Special Issue Biomechanical Properties of Muscle and Tendon in Neurological Conditions)

25 pages, 1117 KB

Open AccessReview

The Validity of Bioelectrical Impedance Analysis Compared to a Four-Compartment Model in Healthy Adults: A Systematic Review

by Christopher J. Oliver, Luke Del Vecchio, Michelle Minehan, Mike Climstein, Nedeljka Rosic, Stephen Myers and Grant Tinsley

J. Funct. Morphol. Kinesiol. 2026, 11(1), 65; https://doi.org/10.3390/jfmk11010065 - 31 Jan 2026

Viewed by 269

Abstract

Background: The four-compartment (4C) model is a criterion method for evaluating body composition tools like bioelectrical impedance analysis (BIA). This systematic review assessed the clinical equivalence of BIA devices compared to the 4C model and explored limitations in using the 4C model as [...] Read more.

Background: The four-compartment (4C) model is a criterion method for evaluating body composition tools like bioelectrical impedance analysis (BIA). This systematic review assessed the clinical equivalence of BIA devices compared to the 4C model and explored limitations in using the 4C model as a criterion method. Methods: Twelve cross-sectional and baseline longitudinal studies involving healthy, weight-stable, non-athlete, non-pregnant adults were included. The primary outcome was a Bland–Altman analysis, with bias, limits of agreement, and proportional bias extracted from each paper. The study quality was evaluated using the AXIS tool. Due to the high variability across studies, a meta-analysis was not performed. Results: BIA devices generally performed poorly against the 4C model estimates of percentage body fat and fat-free mass. Across the 12 studies, mean bias for percentage body fat between BIA and the 4C model ranged from −3.5% to +4.4%, with limits of agreement typically spanning 15 to 20 percentage points. For fat-free mass, mean bias ranged from −3.9 kg to +1.8 kg, with limits of agreement often exceeding ±6 kg. These wide limits indicate non-equivalence at the individual level despite small mean differences. Differences in both BIA device design and variations in 4C methodology across studies may have contributed to these discrepancies. Conclusions: BIA estimates of percentage body fat and fat-free mass were overall not equivalent to the 4C model. Alternative criterion methods, such as MRI, and use of raw BIA data are recommended. Standardization of BIA devices is also needed for improved clinical and research use. Full article

(This article belongs to the Section Kinesiology and Biomechanics)

► Show Figures

Figure 1

15 pages, 1699 KB

Open AccessArticle

Influence of Body Position Changes on Diaphragmatic Excursion Assessed by Ultrasonography in a Healthy Population

by Leonardo Arzayus-Patiño, Jorge Enrique Daza-Arana, Santiago Vásquez Cartagena, Carolina Villamizar, Juan Meléndez Diaz and Diego Fernando Muñoz-Escudero

J. Funct. Morphol. Kinesiol. 2026, 11(1), 64; https://doi.org/10.3390/jfmk11010064 - 31 Jan 2026

Viewed by 161

Abstract

Background: The diaphragm is the primary respiratory muscle, and its proper function is essential for efficient breathing. Respiratory muscle weakness is a common complication that can hinder the withdrawal of mechanical ventilation. This weakness not only negatively affects patients’ quality of life but [...] Read more.

Background: The diaphragm is the primary respiratory muscle, and its proper function is essential for efficient breathing. Respiratory muscle weakness is a common complication that can hinder the withdrawal of mechanical ventilation. This weakness not only negatively affects patients’ quality of life but also represents an economic challenge for healthcare systems, as it significantly increases medical costs due to prolonged hospitalization and the need for additional procedures to manage associated complications. Ultrasonography has emerged as a precise technique for assessing diaphragmatic function through measurements such as diaphragmatic excursion and thickening fraction, with the right hemidiaphragm being the most suitable for evaluation. However, several studies have shown that diaphragmatic ultrasound measurements vary considerably in both healthy individuals and patients, mainly due to the lack of standardization of body position during assessment. Therefore, it is necessary to investigate how patient posture influences diaphragmatic ultrasound measurements in order to standardize protocols, improve diagnostic accuracy, and support reliable clinical decision-making. We employed ultrasonography to determine the influence of changes in body position on diaphragmatic excursion in a healthy population from the city of Cali. Methods: A descriptive cross-sectional study was conducted in 36 healthy adults aged 18 to 65 years, distributed into sex and age groups. Diaphragmatic excursion was assessed using a 3.5–5 MHz ultrasound transducer. Participants were evaluated in five body positions: supine at 0°, and head-of-bed inclinations of 30°, 45°, 70°, and 90°. Results: A progressive increase in diaphragmatic excursion was observed from the supine position (0°) up to 70° inclination. The 70° inclination showed the greatest diaphragmatic mobility as measured by ultrasonography. This finding suggests the existence of an optimal intermediate position in which biomechanical conditions and intra-abdominal pressure allow more efficient diaphragmatic contraction. Conclusions: The results of this study demonstrate that changes in body position significantly influence diaphragmatic excursion in healthy individuals, with a trunk inclination of 70° yielding the greatest diaphragmatic mobility. These findings support the importance of considering body posture as a key determinant in the functional assessment of the diaphragm using ultrasonography. Full article

(This article belongs to the Section Functional Anatomy and Musculoskeletal System)

► Show Figures

Figure 1

16 pages, 661 KB

Open AccessArticle

Cross-Education Effects After Submaximal and Supramaximal Accentuated Eccentric Loading on Lean Mass and Function in Women

by Sergio Maroto-Izquierdo, Miguel Lauría-Martínez, Kayvan Khoramipour, Irati Jauregui-Fajardo, Paula Redondo-Delgado, José Antonio de Paz and David García-López

J. Funct. Morphol. Kinesiol. 2026, 11(1), 63; https://doi.org/10.3390/jfmk11010063 - 31 Jan 2026

Viewed by 101

Abstract

Objective: This study compared the effects of submaximal and supramaximal accentuated eccentric loading (AEL) on lean mass and function in the trained (TL) and contralateral non-trained (NTL) legs of women. Methods: Twenty recreationally trained women were randomly assigned to submaximal (90% 1-RM) or [...] Read more.

Objective: This study compared the effects of submaximal and supramaximal accentuated eccentric loading (AEL) on lean mass and function in the trained (TL) and contralateral non-trained (NTL) legs of women. Methods: Twenty recreationally trained women were randomly assigned to submaximal (90% 1-RM) or supramaximal (120% 1-RM) AEL leg press training (2/week, 10 weeks, 4 sets of 8 repetitions) with 30% 1-RM concentric loading. Total thigh lean mass (TTLM), unilateral leg press 1-RM, mechanical power at 40% (P40), 60% (P60), and 80% (P80) of 1-RM, unilateral countermovement (CMJ) and drop jump (DJ) height, and muscle endurance (XRM) were assessed for each leg before and after intervention. Results: Regarding the TL, the submaximal group showed significant (p < 0.05) increases in 1-RM, P40, CMJ, and DJ, while the supramaximal group showed increased TTLM, 1-RM, P40, P60, and XRM. No significant differences were observed between groups. In the NTL, both groups showed significant increases in 1-RM and P40. Additionally, the submaximal group demonstrated improvements in P60, while the supramaximal group showed significant increases in both P60 and P80, and in TTLM. TL and NTL changes correlated significantly for 1-RM, CMJ, and TTLM. However, TL and NTL changes differed significantly for 1-RM and P40 in the submaximal group and for TTLM in the supramaximal group. Conclusions: Submaximal and supramaximal AEL resulted in similar neuromuscular improvements in both TL and NTL in women. Supramaximal loading provided additional benefits in mechanical power lean mass, while submaximal loading improved explosive performance. Supramaximal loading may not be necessary for active women. Full article

(This article belongs to the Section Kinesiology and Biomechanics)

► Show Figures

Figure 1

16 pages, 1075 KB

Open AccessReview

Functional Design and Clinical Implications of Modern Soccer Footwear: A Comprehensive Narrative Review

by Andrea Demeco, Nicola Marotta, Marco Megna, Andrea Racinelli, Bruno Pansera, Antonio Frizziero, Ilona Yosypchuk, Stefano Palermi, Marco Vecchiato, Ennio Lopresti, Alessandro de Sire and Antonio Ammendolia

J. Funct. Morphol. Kinesiol. 2026, 11(1), 62; https://doi.org/10.3390/jfmk11010062 - 30 Jan 2026

Viewed by 161

Abstract

Soccer is the most widely practiced sport globally, but is also associated with a high incidence of lower limb injuries. Among multiple risk factors, soccer footwear represents a crucial biomechanical interface affecting traction, proprioception, and joint loading. This narrative review aims to explore [...] Read more.

Soccer is the most widely practiced sport globally, but is also associated with a high incidence of lower limb injuries. Among multiple risk factors, soccer footwear represents a crucial biomechanical interface affecting traction, proprioception, and joint loading. This narrative review aims to explore how each component of modern soccer footwear impacts performance and injury risk, with a focus on evidence-based functional customization. A comprehensive narrative review of available literature was conducted across PubMed, Scopus, and Web of Science, integrating biomechanical, clinical, and materials science studies. We included studies concerning the structures composing soccer technical footwear. Conical studs were associated with reduced rotational stiffness and lower joint torque, while bladed studs enhanced linear traction but increased ACL strain risk. Upper materials, such as knitted fabrics and engineered mesh, improve proprioception and thermal regulation but show trade-offs in durability and protection. Soleplate stiffness influenced load distribution and performance: increased stiffness improves sprinting but compromises multidirectional agility. Fatigue and proprioception were modulated by insole and soleplate synergy. Soccer footwear should be seen as a clinical and performance tool requiring evidence-based customization. Advances in material technology, 4D foot scanning, and plantar pressure mapping enable functional matching between footwear and athlete characteristics. Translating these insights into player-specific footwear designs may reduce injury rates and enhance on-field performance. Full article

(This article belongs to the Collection Advances in Rehabilitation and Injury Management)

► Show Figures

Figure 1

19 pages, 374 KB

Open AccessArticle

EXcellence and PERformance in Track and Field (EXPERT)—A Mixed-Longitudinal Study on Growth, Biological Maturation, Performance, and Health in Young Athletes: Baseline Results (Part 2)

by Teresa Ribeiro, José Maia, Filipe Conceição, Adam Baxter-Jones, Eduardo Guimarães, Olga Vasconcelos, Cláudia Dias, Carla Santos, Ana Paulo, Pedro Aleixo, Pedro Pinto, Diogo Teixeira, Sérgio Ramos, Luís Miguel Massuça and Sara Pereira

J. Funct. Morphol. Kinesiol. 2026, 11(1), 61; https://doi.org/10.3390/jfmk11010061 - 30 Jan 2026

Viewed by 182

Abstract

Background: The athletic potential of young athletes is shaped by individual and environmental factors. Objectives: This study examines the physical growth, body composition, biological maturation, motivation, perseverance, physical performance and contextual factors of young male and female track and field athletes. [...] Read more.

Background: The athletic potential of young athletes is shaped by individual and environmental factors. Objectives: This study examines the physical growth, body composition, biological maturation, motivation, perseverance, physical performance and contextual factors of young male and female track and field athletes. Methods: A total of 425 (224 girls) track and field athletes were recruited and divided into five age cohorts (10, 11, 12, 13, and 14 years respectively). Measurements were assessed across (i) individual (anthropometry, body composition, biological maturation, motivation, and perseverance), (ii) performance (motor performance), and (iii) club context domains. Data analysis used descriptive statistics for clubs’ characteristics, a two-factor ANOVA for anthropometry, body composition, biological maturation, and performance and an ANCOVA for motivation and perseverance. All analyses used STATA 18.0. Results: Sex-related differences were identified in physical growth, maturation, psychological, and performance variables during adolescence. Girls reached their peak height velocity (PHV) around 12 years of age, compared to 14 years in boys. At all ages (except at age 11), girls had higher body fat, and at age 12 were taller and outperformed boys in right-handgrip strength and in sprint (30 m and 40 m). From age 13 years onwards, boys became taller, with greater leg length, greater fat-free mass, and superior results (p < 0.05) in most performance tests. Psychologically, girls reported higher levels of interest–enjoyment, effort–importance, relatedness, and perceived choice; no sex differences were found in perseverance. The clubs involved were of small size, with developing, yet qualified, coaches, with limited support staff and infrastructure. Conclusions: Clear sex differences in physical growth, psychological, and performance variables emerged during adolescence, and were related in part to earlier maturation in girls. Further, there was variation in clubs’ infrastructure and staff that may potentially influence track and field athletes’ growth and development. Full article

(This article belongs to the Special Issue Health and Performance Through Sports at All Ages: 4th Edition)

11 pages, 1169 KB

Open AccessArticle

Public Safety Heroes (PUSH) Workout: Task-Specific High-Intensity Functional Training for Emergency Readiness in Fire and Police—Proof of Concept

by Roberto Barcala-Furelos, Fernando Zarzosa-Alonso, Martín Otero-Agra, Felipe Fernández-Méndez and Alejandra Alonso-Calvete

J. Funct. Morphol. Kinesiol. 2026, 11(1), 60; https://doi.org/10.3390/jfmk11010060 - 30 Jan 2026

Viewed by 173

Abstract

Objectives: Public safety personnel, such as police and firefighters, face high physical demands during emergencies, including compressions-only cardiopulmonary resuscitation (CPR) under fatigue. This study aimed to evaluate a High-Intensity Functional Training (HIFT) program, the Public Safety Heroes Workout (PUSH), designed to enhance [...] Read more.

Objectives: Public safety personnel, such as police and firefighters, face high physical demands during emergencies, including compressions-only cardiopulmonary resuscitation (CPR) under fatigue. This study aimed to evaluate a High-Intensity Functional Training (HIFT) program, the Public Safety Heroes Workout (PUSH), designed to enhance emergency readiness. Methods: Fifteen active-duty public safety officers participated in a pilot study. The PUSH workout included tasks like sandbag carries and burpee box jumps, interspersed with chest compressions (CC). Physiological responses, including lactate levels, heart rate, and Compressions-only CPR quality, were measured. Results: The PUSH workout induced significant metabolic stress, with lactate levels rising from 2.2 to 14.8 mmol·L⁻¹. Heart rates peaked at 170 bpm, indicating high cardiovascular demand. Compressions-only CPR quality remained high, with firefighters outperforming police in compression rate. Conclusions: The PUSH workout effectively simulates the physical demands of emergency situations, enhancing readiness and compressions-only CPR performance under fatigue. This training model could be applied to other first responders and CrossFit^® athletes. Full article

(This article belongs to the Special Issue Tactical Athlete Health and Performance, 2nd Edition)

► Show Figures

Figure 1

18 pages, 1226 KB

Open AccessReview

The Effect of Joint Mobilization and Manipulation on Proprioception: Systematic Review with Limited Meta-Analysis

by Stelios Hadjisavvas, Irene-Chrysovalanto Themistocleous, Michalis A. Efstathiou, Elena Papamichael, Christina Michailidou and Manos Stefanakis

J. Funct. Morphol. Kinesiol. 2026, 11(1), 59; https://doi.org/10.3390/jfmk11010059 - 29 Jan 2026

Viewed by 215

Abstract

Background: Proprioceptive deficits, commonly quantified as joint position sense error (JPSE), are frequently reported in musculoskeletal conditions. Articular manual therapy may influence afferent input and sensorimotor integration. This review synthesised the effects of joint mobilization and/or high-velocity low-amplitude (HVLA) thrust manipulation on quantitative [...] Read more.

Background: Proprioceptive deficits, commonly quantified as joint position sense error (JPSE), are frequently reported in musculoskeletal conditions. Articular manual therapy may influence afferent input and sensorimotor integration. This review synthesised the effects of joint mobilization and/or high-velocity low-amplitude (HVLA) thrust manipulation on quantitative proprioception outcomes in humans. Methods: PubMed, Scopus, CINAHL, and MEDLINE Complete were searched (from inception to November 2025) for randomized or sham-controlled trials assessing proprioception after eligible articular manual therapy. Searches were limited to English-language publications. Risk of bias was assessed using Risk of Bias 2 (RoB 2). Random-effects meta-analysis (Hedges’ g) was conducted when outcomes and time points were comparable; pooling was possible for only one outcome/time-point comparison. Certainty of evidence was assessed using GRADE. Results: Database searches yielded 483 records; after duplicate removal, 371 records were screened. Eighteen full-text articles were assessed for eligibility, of which 11 were excluded, resulting in seven randomized clinical trials (2018–2025; total n = 350) evaluating spinal or peripheral mobilization/manipulation. No eligible randomized or sham-controlled trials meeting the prespecified criteria were identified before 2018. In chronic mechanical neck pain, cervical thrust manipulation improved cervical JPSE versus sham with large partial eta-squared effects (η²p = 0.23–0.36). Cervical mobilization improved left rotation JPSE (4.15 → 1.65° vs. 4.01→3.74°). In patellofemoral pain, lumbopelvic manipulation produced immediate reductions in knee JPSE at 60° (6.58 → 4.48° vs. 5.91 → 6.05°). Only one outcome/time-point was suitable for meta-analysis (knee JPSE at 60° flexion in patellofemoral pain; two trials), showing no statistically significant pooled effect (Hedges’ g = −0.21, 95% CI −1.36 to 0.94; I² ≈ 83%). Remaining outcomes could not be pooled due to heterogeneity and incompatible reporting. Conclusions: Evidence from seven randomized trials indicates that articular manual therapy (mobilization and/or HVLA thrust manipulation) can improve quantitative proprioceptive outcomes immediately post-intervention, particularly JPSE in neck and patellofemoral pain; however, effects are condition- and outcome-specific, and confidence is limited by heterogeneity and the predominance of narrative synthesis with sparse poolable data. Future adequately powered trials should standardize proprioception protocols, include longer follow-up, and report data to enable robust meta-analysis. Full article

(This article belongs to the Special Issue Basis of Applied Kinesiology, Innovations and Clinical Applications in Musculoskeletal Health, 2nd Edition)

► Show Figures

Figure 1

11 pages, 397 KB

Open AccessArticle

Interrelationships and Shared Variance Among Three Field-Based Performance Tests in Competitive Youth Soccer Players

by Andrew D. Fields, Matthew A. Mohammadnabi, Oleg A. Sinelnikov and Michael R. Esco

J. Funct. Morphol. Kinesiol. 2026, 11(1), 58; https://doi.org/10.3390/jfmk11010058 - 29 Jan 2026

Viewed by 173

Abstract

Objectives: Field-based testing is commonly used to evaluate key physical qualities related to soccer performance. However, limited research has examined the degree of shared variance among measures of aerobic capacity, change of direction (COD), and explosive power in youth athletes. This study investigated [...] Read more.

Objectives: Field-based testing is commonly used to evaluate key physical qualities related to soccer performance. However, limited research has examined the degree of shared variance among measures of aerobic capacity, change of direction (COD), and explosive power in youth athletes. This study investigated the relationships between the 20 m shuttle run (20MSR), T-test (TT), and vertical countermovement jump (CMJ) to determine their unique and overlapping contributions to each other’s performance in competitive youth soccer players. Methods: Twenty-five competitive male youth soccer players (13.7 ± 0.8 years) completed standardized assessments of TT, CMJ, and 20MSR during pre-season evaluations. Pearson correlations and hierarchical multiple regression analyses were used to examine associations and independent variance explained among the performance measures. Results: Large, significant correlations were observed between TT and CMJ (r = −0.65, p < 0.001), TT and 20MSR (r = −0.59, p < 0.001), and CMJ and 20MSR (r = 0.53, p = 0.007). CMJ explained 42.3% of TT variance, whereas adding 20MSR did not significantly improve model fit (ΔR² = 0.087, p = 0.062). Across models, aerobic capacity did not contribute significant unique variance beyond neuromuscular performance. Conclusions: COD and lower-body power share a common physiological foundation in youth soccer athletes, while aerobic capacity represents a distinct performance domain. When field tests are administered under applied conditions typical of youth soccer environments, TT and CMJ demonstrate substantial shared variance, whereas 20MSR remains largely independent. Therefore, the findings support the continued use of multi-modal testing batteries in practice. Full article

(This article belongs to the Special Issue Efficiency in Kinesiology: Innovative Approaches in Enhancing Motor Skills for Athletic Performance, 4th Edition)

► Show Figures

Figure 1

16 pages, 1316 KB

Open AccessArticle

Flexibility in Wrestlers, Taekwondoists, and Non-Athletes During the Developmental Ages: The Effects of Sport, Age, and Sex

by Vassilis Gerodimos, Nikolaos Tsiakaras and Konstantina Karatrantou

J. Funct. Morphol. Kinesiol. 2026, 11(1), 57; https://doi.org/10.3390/jfmk11010057 - 29 Jan 2026

Viewed by 187

Abstract

Objectives: Flexibility may be influenced by several factors, including age, sex, and physical activity or sport. This study simultaneously investigated the effect of sport (wrestling vs. taekwondo vs. no participation in sports activities), age (children vs. adolescents), and sex (boys vs. girls) on [...] Read more.

Objectives: Flexibility may be influenced by several factors, including age, sex, and physical activity or sport. This study simultaneously investigated the effect of sport (wrestling vs. taekwondo vs. no participation in sports activities), age (children vs. adolescents), and sex (boys vs. girls) on lower and upper body flexibility during the developmental ages. Methods: A total of 120 wrestlers, 120 taekwondoists, and 120 non-athletes (60 boys: 30 children and 30 adolescents; 60 girls: 30 children and 30 adolescents, per group) participated in the present study and performed two flexibility tests (sit and reach, back scratch). Results: ANOVAs and ANCOVAs (using anthropometric characteristics as covariates) analyses showed greater (p = 0.000–0.005) flexibility values in wrestlers and taekwondoists than non-athletes (except for the sit and reach in children girls, and flexibility of the right hand in children boys and girls, where no differences were observed). However, no differences (p = 0.672–0.992) were presented between wrestlers and taekwondoists (except for the flexibility of the left hand, where wrestlers showed greater values). Within the wrestlers and taekwondoists groups, children exhibited lower (p = 0.01–0.04) values than adolescents; while, in non-athletes, no age-related differences were observed (p = 0.263–0.995). Additionally, girls demonstrated higher values than boys, and the right hand demonstrated higher flexibility values than the left hand (p = 0.000–0.04). The difference between hands was greater (p = 0.000–0.01) in non-athletes (69.14–96.22%) vs. athletes (23.73–58.85%), taekwondoists (41.01–58.85%) vs. wrestlers (23.73–47%), and boys (44.68–96.22%) vs. girls (23.73–70.44%). Conclusions: It seems that engaging in wrestling and taekwondo sports affects the growth pattern of flexibility in boys and girls during the developmental ages. Full article

(This article belongs to the Section Physical Exercise for Health Promotion)

► Show Figures

Figure 1

5 pages, 184 KB

Open AccessEditorial

Special Issue “Advances in Kinanthropometry: Techniques and Applications in Sports and Health”

by Stefania Toselli, Natascia Rinaldo and Luciana Zaccagni

J. Funct. Morphol. Kinesiol. 2026, 11(1), 56; https://doi.org/10.3390/jfmk11010056 - 29 Jan 2026

Viewed by 114

Abstract

The field of kinanthropometry has developed substantially over recent years, reflecting the growing interest in understanding human structure, function, and performance through methods that capture the multidimensional nature of growth, training, health, and aging [...] Full article

(This article belongs to the Special Issue Advances in Kinanthropometry: Techniques and Applications in Sports and Health)

10 pages, 908 KB

Open AccessArticle

Measuring Muscle Post-Exercise Oxygen Consumption in Individuals with a Family History of Diabetes

by Kevin K. McCully, Olivia Kachappilly, Charlotte Flame and Abheeraj Jain

J. Funct. Morphol. Kinesiol. 2026, 11(1), 55; https://doi.org/10.3390/jfmk11010055 - 29 Jan 2026

Viewed by 181

Abstract

Background: Post-exercise oxygen consumption (EPOC) contributes to the health benefits of exercise, and changes in EPOC may play a role in the development of diabetes. Near-infrared spectroscopy (NIRS) is a tool used to evaluate muscle metabolism. This study used a novel NIRS-based method [...] Read more.

Background: Post-exercise oxygen consumption (EPOC) contributes to the health benefits of exercise, and changes in EPOC may play a role in the development of diabetes. Near-infrared spectroscopy (NIRS) is a tool used to evaluate muscle metabolism. This study used a novel NIRS-based method of measuring EPOC in the forearm muscles of young adults with and without a family history of diabetes. Methods: Fourteen female adults with and without an immediate family history of diabetes were tested. A two-group, one-day design was used with three protocols: ischemic reperfusion, EPOC, and mitochondrial capacity. Muscle oxygen levels were measured with NIRS in the forearm. Blood flow was assessed as the initial reperfusion rate following 5 min of ischemia. EPOC was measured after 60 s of rapid wrist curls with a 2.3 kg weight, followed by measurements every minute for 10 min. Muscle mitochondrial capacity (mVO₂max) was determined from the recovery rate of muscle metabolism after 30 s of electrical stimulation. EPOC was calculated as the area under the curve of oxygen consumption over 10 min after exercise, subtracting the phosphocreatine contribution calculated from mVO₂max. Group comparisons were made using t-tests with significance at p < 0.05. Results: mVO₂max was not different between those with a positive (1.60 ± 0.15 min⁻¹) and those with a negative family history (1.45 ± 0.17 min⁻¹), p = 0.11. Net EPOC was not different between those with a positive (20.0 ± 7.2 O₂·s) and those with a negative (19.6 ± 11.3 O₂·s) family history, p = 0.94. Conclusions: Muscle EPOC minus PCr was calculated after a short, intense bout of exercise. No differences were found in the mitochondrial capacity or EPOC between young healthy individuals with and without a family history of diabetes. This study presents the use of EPOC to evaluate muscle metabolism in populations at risk for diabetes and other related disorders. Full article

(This article belongs to the Section Functional Anatomy and Musculoskeletal System)

► Show Figures

Figure 1

13 pages, 439 KB

Open AccessArticle

The Influence of Training with an Evaluation Mask on Physiological Adaptations in a Recreational Athlete

by Marko Kunac, Petar Šušnjara and Danijela Kuna

J. Funct. Morphol. Kinesiol. 2026, 11(1), 54; https://doi.org/10.3390/jfmk11010054 - 27 Jan 2026

Viewed by 227

Abstract

Background: Innovative training strategies aimed at improving physiological efficiency are of growing interest in kinesiology and sports performance. Elevation training masks (ETMs) offer a practical means of inducing hypoxia-like stress. However, evidence of their effectiveness in recreationally active populations remains limited. This pilot [...] Read more.

Background: Innovative training strategies aimed at improving physiological efficiency are of growing interest in kinesiology and sports performance. Elevation training masks (ETMs) offer a practical means of inducing hypoxia-like stress. However, evidence of their effectiveness in recreationally active populations remains limited. This pilot study examined the efficiency of a five-week progressive ETM protocol combined with high-intensity interval training (HIIT) in eliciting physiological, hematological, and body-composition adaptations relevant to endurance performance. Methods: Nine recreationally active men completed a five-week intervention consisting of three treadmill-based sessions per week: one weekly incremental Conconi test and two structured aerobic–anaerobic HIIT sessions performed with an ETM. Mask resistance was progressively increased to simulate altitudes of approximately 900–3600 m. Hematological variables (erythrocytes, hemoglobin, hematocrit, erythrocyte indices, leukocytes, and platelets), body composition, maximal heart rate (HRmax), and peripheral oxygen saturation (SpO₂) were assessed pre- and post intervention. Data were analyzed using paired-sample t-tests and repeated-measures ANOVA, with effect sizes reported (Cohen’s d, ω²). Results: A significant main effect of time on SpO₂ was observed (F(1, 8) = 130.61, p < 0.001, ω² = 0.69), along with a significant effect of training week (F(4, 32) = 17.41, p < 0.001, ω² = 0.43), and a significant Time × Week interaction (F(4, 32) = 15.20, p < 0.001, ω² = 0.42), indicating progressively greater post-exercise oxygen desaturation with increasing simulated altitude. Significant post-intervention increases were found in erythrocyte count, hemoglobin concentration, and hematocrit (p ≤ 0.009, d = 1.15–1.55), alongside increases in mean corpuscular volume and mean corpuscular hemoglobin. Platelet count increased significantly (p = 0.001, d = 1.68), while leukocyte values remained unchanged (p > 0.05). Body mass index (p = 0.049, d = 0.77) and body fat percentage (p = 0.012, d = 1.08) decreased following the intervention. HRmax tended to be lower at higher simulated altitudes. Conclusions: A five-week progressive ETM-HIIT protocol efficiently induced hematological and body-composition adaptations associated with improved oxygen transport and metabolic efficiency in recreationally active men. These findings support ETM-based training as an accessible strategy for enhancing physiological efficiency in endurance-oriented kinesiology practice, warranting confirmation in larger randomized controlled studies. Full article

(This article belongs to the Special Issue Efficiency in Kinesiology: Innovative Approaches in Enhancing Motor Skills for Athletic Performance, 4th Edition)

► Show Figures

Figure 1

17 pages, 1129 KB

Open AccessArticle

Kinematic and Kinetic Adaptations to Step Cadence Modulation During Walking in Healthy Adults

by Joan Lluch Fruns, Maria Cristina Manzanares-Céspedes, Laura Pérez-Palma and Carles Vergés Salas

J. Funct. Morphol. Kinesiol. 2026, 11(1), 53; https://doi.org/10.3390/jfmk11010053 - 26 Jan 2026

Viewed by 154

Abstract

Background: Walking cadence is commonly adjusted in sport and rehabilitation, yet its effects on spatiotemporal gait parameters and regional plantar pressure distribution under controlled speed conditions remain incompletely characterized. Therefore, this study aimed to determine whether imposed cadence increases at a constant walking [...] Read more.

Background: Walking cadence is commonly adjusted in sport and rehabilitation, yet its effects on spatiotemporal gait parameters and regional plantar pressure distribution under controlled speed conditions remain incompletely characterized. Therefore, this study aimed to determine whether imposed cadence increases at a constant walking speed would (i) systematically reduce temporal gait parameters while preserving inter-limb symmetry and (ii) be associated with region-specific increases in forefoot plantar loading, representing the primary novel contribution of this work. Methods: Fifty-two adults walked at three imposed cadences (110, 120, 130 steps·min⁻¹) while maintaining a fixed treadmill speed of 1.39 m·s⁻¹ via auditory biofeedback. Spatiotemporal parameters were recorded with an OptoGait system, and plantar pressure distribution was measured using in-shoe pressure insoles. Normally distributed variables were analyzed using repeated-measures ANOVA, whereas plantar pressure metrics were assessed using the Friedman test, followed by Wilcoxon signed-rank post-hoc comparisons with false discovery rate (FDR) correction. Associations between temporal parameters and plantar loading metrics (peak pressure, pressure–time integral) were examined using Spearman’s rank correlation with FDR correction (α = 0.05). Results: Increasing cadence produced progressive reductions in gait cycle duration (~8–10%), contact time (~7–8%), and step time (all p < 0.01), while inter-limb symmetry indices remained below 2% across conditions. Peak plantar pressure increased significantly in several forefoot regions with increasing cadence (all p_FDR < 0.05), whereas changes in the first ray were less consistent across conditions. Regional forefoot pressure–time integral also increased modestly with higher cadence (p_FDR < 0.01). Spearman’s correlations revealed moderate negative associations between temporal gait parameters and global plantar loading metrics (ρ = −0.38 to −0.46, all p_FDR < 0.05). Conclusions: At a constant walking speed, increasing cadence systematically shortens temporal gait components and is associated with small but consistent region-specific increases in forefoot plantar loading. These findings highlight cadence as a key temporal constraint shaping plantar loading patterns during steady-state walking and support the existence of concurrent temporal–mechanical adaptations. Full article

(This article belongs to the Special Issue Posture, Balance, and Gait: Assessment Techniques and Rehabilitation Strategies—2nd Edition)

► Show Figures

Graphical abstract

1 pages, 146 KB

Open AccessExpression of Concern

Expression of Concern: Mandroukas et al. Surface Electromyographic Activity of the Rectus Abdominis and External Oblique during Isometric and Dynamic Exercises. J. Funct. Morphol. Kinesiol. 2022, 7, 67

by Journal of Functional Morphology and Kinesiology Editorial Office

J. Funct. Morphol. Kinesiol. 2026, 11(1), 52; https://doi.org/10.3390/jfmk11010052 - 26 Jan 2026

Viewed by 83

Abstract

With this notice, the Journal of Functional Morphology and Kinesiology Editorial Office alerts the readers to concerns related to this article [...] Full article

(This article belongs to the Section Physical Exercise for Health Promotion)

1 pages, 139 KB

Open AccessExpression of Concern

Expression of Concern: Mandroukas et al. Muscle Strength and Joint Range of Motion of the Spine and Lower Extremities in Female Prepubertal Elite Rhythmic and Artistic Gymnasts. J. Funct. Morphol. Kinesiol. 2023, 8, 153

by Journal of Functional Morphology and Kinesiology Editorial Office

J. Funct. Morphol. Kinesiol. 2026, 11(1), 51; https://doi.org/10.3390/jfmk11010051 - 26 Jan 2026

Viewed by 86

Abstract

With this notice, the Journal of Functional Morphology and Kinesiology Editorial Office alerts the readers to concerns related to this article [...] Full article

(This article belongs to the Section Kinesiology and Biomechanics)

1 pages, 139 KB

Open AccessExpression of Concern

Expression of Concern: Mandroukas et al. Muscle Strength and Hamstrings to Quadriceps Ratio in Young Soccer Players: A Cross-Sectional Study. J. Funct. Morphol. Kinesiol. 2023, 8, 70

by Journal of Functional Morphology and Kinesiology Editorial Office

J. Funct. Morphol. Kinesiol. 2026, 11(1), 50; https://doi.org/10.3390/jfmk11010050 - 26 Jan 2026

Viewed by 86

Abstract

With this notice, the Journal of Functional Morphology and Kinesiology Editorial Office alerts the readers to concerns related to this article [...] Full article

(This article belongs to the Section Functional Anatomy and Musculoskeletal System)

4 pages, 167 KB

Open AccessEditorial

Special Issue “Role of Exercises in Musculoskeletal Disorders—7th Edition”

by Giuseppe Musumeci

J. Funct. Morphol. Kinesiol. 2026, 11(1), 49; https://doi.org/10.3390/jfmk11010049 - 23 Jan 2026

Viewed by 122

Abstract

The seventh edition of the Special Issue “Role of Exercises in Musculoskeletal Disorders” further clarifies how exercise interventions can lead to measurable benefits across various musculoskeletal conditions, ages, and care settings [...] Full article

(This article belongs to the Special Issue Role of Exercises in Musculoskeletal Disorders—7th Edition)

12 pages, 540 KB

Open AccessArticle

Effect of HIIT Training Modality in People with Pre-Diabetes

by Talia Tene, Raynier Zambrano-Villacres, Cristina Isabel Puruncajas-Rodríguez, Daniel Tettamanti Miranda, Mónica Cristina Tello-Moreno, Angela Priscila Campos-Moposita, Stalin Javier Caiza Lema, Martha Montalvan and Richard Tene-Fernandez

J. Funct. Morphol. Kinesiol. 2026, 11(1), 48; https://doi.org/10.3390/jfmk11010048 - 22 Jan 2026

Viewed by 262

Abstract

Objectives: Prediabetes is characterized by elevated blood glucose levels associated with insulin resistance, increasing the risk of progression to type 2 diabetes mellitus (T2DM) and cardiovascular disease. High-intensity interval training (HIIT) has emerged as an effective non-pharmacological strategy to improve insulin sensitivity [...] Read more.

Objectives: Prediabetes is characterized by elevated blood glucose levels associated with insulin resistance, increasing the risk of progression to type 2 diabetes mellitus (T2DM) and cardiovascular disease. High-intensity interval training (HIIT) has emerged as an effective non-pharmacological strategy to improve insulin sensitivity and cardiorespiratory fitness. This study aimed to analyze the effects of HIIT alone or combined with a hypocaloric diet on metabolic and cardiorespiratory parameters in individuals with prediabetes. Methods: A controlled, longitudinal, single-blind intervention study enrolled 68 adults with prediabetes (mean age 42.22–46.60 years; 73.5% women) and randomized them to HIIT plus hypocaloric diet (n = 23), HIIT only (n = 23), or hypocaloric diet only (n = 22) for 13 weeks, with pre/post assessments of glucose, VO₂max, blood pressure, FINDRISC. Results: Significant post-intervention differences were observed among groups in body mass index (p = 0.049), VO₂max (p < 0.001), fasting glucose (p < 0.001), systolic blood pressure (p < 0.001), and diabetes risk (p = 0.038), with the greatest improvements consistently observed in Group A. In Group A, fasting glucose decreased from 111.94 to 91.28 mg/dL (−20.66 mg/dL; −18.5%), VO₂max increased from 21.27 to 24.02 mL·kg⁻¹·min⁻¹ (+2.75; +12.9%), and systolic blood pressure decreased from 163.56 to 150.13 mmHg (−13.43 mmHg; −8.2%). No significant between-group differences were found for body weight (p = 0.271) or waist circumference (p = 0.174). Conclusions: HIIT combined with a hypocaloric diet is an effective and safe strategy for managing prediabetes, producing superior improvements in cardiorespiratory fitness, glycemic control, and reduction in diabetes risk compared with either intervention alone. Full article

(This article belongs to the Section Physical Exercise for Health Promotion)

► Show Figures

Figure 1

17 pages, 1017 KB

Open AccessArticle

Effects of Knee Sleeve Density on Theoretical Neuromuscular Capacities Derived from the Force–Velocity–Power Profile in the Back Squat

by Jorge Leschot-Gatica, Luis Romero-Vera, Alberto Ñancupil-Andrade, Claudio Hernández-Mosqueira, Iván Molina-Márquez, Rodrigo Yáñez-Sepúlveda, Felipe Montalva-Valenzuela and Eduardo Guzmán-Muñoz

J. Funct. Morphol. Kinesiol. 2026, 11(1), 47; https://doi.org/10.3390/jfmk11010047 - 22 Jan 2026

Viewed by 157

Abstract

Background: Neoprene knee sleeves are commonly used to enhance joint stability and mechanical performance during resistance training. However, the specific influence of sleeve density on the force–velocity–power (F–V–P) profile during multi-joint lower-body exercises such as the back squat remains unclear. This study [...] Read more.

Background: Neoprene knee sleeves are commonly used to enhance joint stability and mechanical performance during resistance training. However, the specific influence of sleeve density on the force–velocity–power (F–V–P) profile during multi-joint lower-body exercises such as the back squat remains unclear. This study aimed to compare the theoretical F–V–P parameters derived from back squat performance while wearing low-density (LD) versus high-density (HD) knee sleeves. Methods: Fifteen resistance-trained males completed an incremental back squat test under both LD and HD conditions. A linear position transducer recorded barbell displacement and velocity. Individual force–velocity relationships were modelled to determine maximal theoretical force (F₀), velocity (V₀), power (Pmax), and the F–V slope. Paired-sample t-tests, linear mixed models, and Cohen’s d effect sizes were calculated. Clinical relevance was assessed using a threshold defined as 0.2 × the standard deviation of the HD condition. Bayesian analyses were conducted to estimate the probability and magnitude of the observed effects. Results: No statistically significant differences were observed between sleeve conditions for F₀, V₀, Pmax, or F–V slope (p > 0.05, d ≤ 0.37). Nonetheless, HD sleeves yielded slightly higher mean values for F₀, V₀, and Pmax, exceeding the predefined threshold for practical relevance. Bayesian models showed moderate probabilities (~0.80) that HD sleeves outperformed LD, though with limited chances of crossing the clinical significance threshold. Conclusions: Although HD sleeves do not produce systematic changes in F–V–P parameters, their increased material stiffness may provide small yet practically meaningful mechanical advantages in high-force resistance training contexts. Full article

(This article belongs to the Section Kinesiology and Biomechanics)

► Show Figures

Figure 1

9 pages, 836 KB

Open AccessCommunication

Test–Retest Reliability of Single-Arm Closed Kinetic Chain Upper Extremity Stability Test

by Andy Waldhelm, Mareli Klopper, Matthew Paul Gonzalez, Stephanie Flynn, Edward Austin and Ron Masri

J. Funct. Morphol. Kinesiol. 2026, 11(1), 46; https://doi.org/10.3390/jfmk11010046 - 21 Jan 2026

Viewed by 155

Abstract

Background: The original Closed Kinetic Chain Upper Extremity Stability Test (CKCUEST) is a simple assessment tool but does not account for individual differences in hand starting position and fails to provide information on limb asymmetries. The purpose of the study is to evaluate [...] Read more.

Background: The original Closed Kinetic Chain Upper Extremity Stability Test (CKCUEST) is a simple assessment tool but does not account for individual differences in hand starting position and fails to provide information on limb asymmetries. The purpose of the study is to evaluate the test–retest reliability of a new single-arm CKCUEST as well as the reliability of the limb symmetry index (LSI). This version normalizes the test based on the participant’s arm length and allows for the assessment of limb symmetry since it is performed one arm at a time. Methods: Twelve healthy young adults provided both verbal and written consent to participate. Participants were excluded if they had sustained an injury in the past three months requiring medical attention and/or resulting in decreased activity for more than three days. Testing was conducted in the push-up position with participants’ thumbs placed parallel and at a distance equal to the length of their dominant arm (measured from the acromion to the tip of the middle finger), and feet positioned shoulder-width apart. Participants were instructed to keep the testing hand stable on the floor while the opposite hand reached across the body to touch the stationary hand and then return to the starting position marked with athletic tape. The goal was to complete as many touches as possible in 15 s, with each touch counted only if the participant touched the stationary hand, returned to the starting position, and maintained the shoulder-width stance. The average number of touches from the three trials was used for analysis. Intraclass Correlation Coefficients (ICC_(3,1)) were computed to determine test–retest reliability. Results: Test–retest reliability of the single-arm CKCUEST individual tests was good to excellent. The ICC_(3,1) was 0.88 (95% CI: 0.74–0.95) for all tests, 0.89 (95% CI: 0.66–0.96) for the dominant arm, and 0.93 (95% CI: 0.78–0.98) for the non-dominant arm. In contrast, the reliability of the Limb Symmetry Index (LSI) was questionable, showing substantial variability with an ICC_(3,1) of 0.53 (95% CI: −0.03–0.83) between Day 1 and Day 2, despite similar mean values (Day 1: 93.6 ± 8.46; Day 2: 94.8 ± 5.77). The Kappa coefficient suggested a substantial level of agreement for the direction of the asymmetry (preferred limb) (Kappa coefficient = 0.62). Conclusions: The new single-arm CKCUEST, which personalizes the hand starting position and measures limb symmetry, demonstrates high reliability among healthy young adults. Full article

(This article belongs to the Section Kinesiology and Biomechanics)

► Show Figures

Figure 1

19 pages, 1496 KB

Open AccessArticle

Dynamic Neuromuscular Stabilization for Midlife Women with Frozen Shoulder: Clinical Effects on COP and Pain

by Hyeon Ji Kim, Il Bong Park, Hyun Ju Kim and Chae Kwan Lee

J. Funct. Morphol. Kinesiol. 2026, 11(1), 45; https://doi.org/10.3390/jfmk11010045 - 21 Jan 2026

Viewed by 191

Abstract

Objectives: Frozen shoulder (FS) leads to pain, reduced shoulder function, and deficits in postural stability and sensorimotor control during upper-limb weight-bearing and activities of daily living tasks. This study investigated how an eight-week Dynamic Neuromuscular Stabilization (DNS) program affected Center of Pressure [...] Read more.

Objectives: Frozen shoulder (FS) leads to pain, reduced shoulder function, and deficits in postural stability and sensorimotor control during upper-limb weight-bearing and activities of daily living tasks. This study investigated how an eight-week Dynamic Neuromuscular Stabilization (DNS) program affected Center of Pressure (COP) control and pain in midlife women with FS. Methods: Twenty-two midlife women with FS were randomly assigned to a DNS group (DNSG, n = 11) or a control group (CG, n = 11). The DNSG performed DNS exercises twice weekly for eight weeks, while the CG performed a dynamic stretching–based active control program. COP variables (distance, velocity, and root mean square (RMS) in the anterior–posterior (AP) and medial–lateral (ML) directions) were measured using a force platform under affected-side single-hand support with visual input and bilateral hand support with and without visual input. Pain was assessed using the Visual Analog Scale (VAS). All variables were analyzed using a two-way mixed ANOVA. Results: Under the affected-side single-hand support condition, a significant group × time interaction was observed for the prespecified primary outcome, ML-RMS (p < 0.05). Other COP variables under this condition were not significant after Holm–Bonferroni correction. Under bilateral hand-support conditions, ML-RMS remained significant after multiplicity adjustment in both visual conditions (p < 0.05). Pain (VAS) decreased over time in both groups, with no significant group × time interaction observed. Conclusions: The DNS intervention was associated with positive changes in COP-based postural control during upper-limb weight-bearing tasks in midlife women with FS. Pain decreased over time in both groups, with no significant group-by-time interaction. These findings suggest that DNS may be a potentially useful intervention for improving postural stability during upper-limb support tasks in patients with FS. Full article

(This article belongs to the Section Functional Anatomy and Musculoskeletal System)

► Show Figures

Figure 1

15 pages, 402 KB

Open AccessArticle

Acute Effects of Three Recovery Interventions on Post-Practice Vertical Jump Force-Time Metrics in Female Basketball Players

by Dimitrije Cabarkapa, Damjana V. Cabarkapa, Dora Nagy, Richard Repasi, Tamas Laczko and Laszlo Ratgeber

J. Funct. Morphol. Kinesiol. 2026, 11(1), 44; https://doi.org/10.3390/jfmk11010044 - 21 Jan 2026

Viewed by 235

Abstract

Objectives: The purpose of the present study was to investigate the acute effects of cold-water immersion (CWI), cryotherapy (CRT), and intermittent pneumatic compression (IPC) on lower-body neuromuscular performance in female basketball players. Methods: Eighteen athletes volunteered to participate (body mass = [...] Read more.

Objectives: The purpose of the present study was to investigate the acute effects of cold-water immersion (CWI), cryotherapy (CRT), and intermittent pneumatic compression (IPC) on lower-body neuromuscular performance in female basketball players. Methods: Eighteen athletes volunteered to participate (body mass = 63.0 ± 7.2 kg; height = 171.4 ± 6.5 cm; age = 16.4 ± 1.2 years), completing testing at three time points: (i) pre-practice, (ii) post-practice, and (iii) 45–60 min following a randomly assigned recovery intervention. At each time point, athletes performed three countermovement vertical jumps on a dual force plate system sampling at 1000 Hz (VALD Performance). To standardize external load across groups, all players wore inertial measurement units (Kinexon). Results: The two-way repeated measures ANOVA showed no statistically significant interaction (p > 0.05) between the three testing time points and recovery modalities for any of the analyzed variables. However, a significant main effect of time was observed, with 13 of 20 force-time metrics (65%), including jump height, reactive strength index-modified, contraction time, and concentric peak and mean force, declining post-recovery compared with pre-practice values, regardless of the recovery intervention applied. External load measures (e.g., total distance, number of jumps) remained consistent across groups. Conclusions: Overall, these findings suggest that CWI, CRT, and IPC were no more effective than passive recovery (i.e., control group) in mitigating post-practice declines in lower-body force and power-producing capacities. Full article

(This article belongs to the Special Issue Physiological and Biomechanical Foundations of Strength Training)

► Show Figures

Figure 1

12 pages, 1759 KB

Open AccessCommunication

Cervical Spine Degeneration in Rugby Players: Position-Specific Differences in Radiographic and Clinical Outcomes Among 64 Brazilian Athletes

by Matheus Neves Castanheira, Yoshinobu Nagasse, Michel Kanas, Nelson Astur, Délio Eulálio Martins Filho, Felipe Neves Simões Monteiro and Marcelo Wajchenberg

J. Funct. Morphol. Kinesiol. 2026, 11(1), 43; https://doi.org/10.3390/jfmk11010043 - 20 Jan 2026

Viewed by 146

Abstract

Background: Rugby exposes athletes to high mechanical loads, especially during scrums and tackles, potentially predisposing players to early cervical spine degeneration. This study evaluated the prevalence of degenerative changes in the cervical spine and sagittal alignment alterations in Brazilian rugby athletes, with secondary [...] Read more.

Background: Rugby exposes athletes to high mechanical loads, especially during scrums and tackles, potentially predisposing players to early cervical spine degeneration. This study evaluated the prevalence of degenerative changes in the cervical spine and sagittal alignment alterations in Brazilian rugby athletes, with secondary analyses comparing forwards and backs and examining associations between alignment parameters and pain and disability. Methods: Sixty-four professional rugby athletes underwent cervical spine radiography, and the images were analyzed for degenerative findings and sagittal parameters (cervical lordosis, T1 slope, cervical sagittal vertical axis, and T1–CL mismatch). Pain and disability were assessed using the Visual Analogue Scale (VAS) and Neck Disability Index (NDI). Comparative analyses included Student’s t-test and Fisher’s exact test, while additional exploratory analyses were performed using correlation and multiple linear regression models. Results: Cervical degeneration was present in 20.3% of players. Forwards reported significantly greater pain than backs (VAS: 1.64 ± 1.58 vs. 0.76 ± 0.93; p = 0.007). Deviations in cervical lordosis (>2 SD from normative values) were associated with higher VAS scores (p = 0.024). No significant associations were found between T1 slope or cervical sagittal vertical axis and pain or disability. Conclusions: Forwards demonstrated greater symptom burden and a higher prevalence of cervical degenerative changes, suggesting that positional demands may contribute to early cervical spine alterations. These findings highlight the need for targeted preventive strategies and support future longitudinal investigations to clarify the progression and clinical relevance of cervical misalignment in collision-sport athletes. Full article

(This article belongs to the Section Athletic Training and Human Performance)

► Show Figures

Figure 1

21 pages, 1971 KB

Open AccessArticle

Technology-Assisted Neuromotor Training for Improving Visuomotor Reaction Performance, Change-of-Direction Quickness, and Bilateral Task Execution in Junior Handball Players

by Mircea Boncuț, Nicola Mancini, Angel-Alex Hăisan, Delia Boncuț, Emilia Florina Grosu, Cornelia Popovici, Carlos Hervás-Gómez, Cristina Maria Man, Siria Mancini, Mariasole Antonietta Guerriero, Antonella De Maria and Vlad Teodor Grosu

J. Funct. Morphol. Kinesiol. 2026, 11(1), 42; https://doi.org/10.3390/jfmk11010042 - 20 Jan 2026

Viewed by 2060

Abstract

Background: Reaction time and coordination are key performance components in team sports such as handball, particularly during the developmental years. Integrating visual and cognitive stimuli through smart technologies has been shown to facilitate motor skill development in young athletes. Methods: This study evaluated [...] Read more.

Background: Reaction time and coordination are key performance components in team sports such as handball, particularly during the developmental years. Integrating visual and cognitive stimuli through smart technologies has been shown to facilitate motor skill development in young athletes. Methods: This study evaluated the effects of a BlazePod-based training protocol on reaction time, visuomotor coordination, movement quickness, and change-of-direction performance in junior male handball players aged 12–14 years. Thirty-two athletes (mean age = 13.37 ± 0.29 years) were randomly assigned to an experimental group (n = 16), in which the traditional neuromotor/coordination block of regular practice was replaced with BlazePod-based drills three times per week for eight weeks, or to a control group (n = 16), which trained the same capacities with traditional handball-specific exercises without technology. Training frequency (3 sessions/week), session duration (90 min), and the workload of the 30 min neuromotor block were matched between groups. Motor performance was assessed using four tests: Focus Reactions, Fast Feet, Clap Challenge, and the Agility T-Test. Paired- and independent-samples t-tests were applied to compare pre- and post-intervention scores. Results: The experimental group showed significant within-group improvements in Focus Reactions (p = 0.002) and AgilTT_ShuffleLeft (p = 0.014), whereas the control group showed no improvements and a small but significant worsening in Focus Reactions. Between-group comparisons at post-test revealed significant differences in favor of the experimental group for Fast Feet (p = 0.036), Clap Challenge (p = 0.008), AgilTT_Overall (p < 0.001), and AgilTT_SprintBack (p = 0.003). Conclusions: The integration of BlazePod technology into handball training produced measurable improvements in reaction speed and lateral agility among junior players. These findings suggest that technology-assisted neuromotor training represents a viable training modality that can replace a traditional neuromotor block within youth handball practice while maintaining overall training dose. Full article

(This article belongs to the Special Issue Cutting-Edge Technology in Exercise Science: From Performance to Health Applications)

► Show Figures

Figure 1

12 pages, 979 KB

Open AccessArticle

Acute Physiological Responses to Prolonged Sedentary Behavior: Impact on Cardiovascular Function and Muscle Activity in Young Adults

by Jonas Ribeiro Gomes da Silva, Antônio Ribeiro Neto, Dernival Bertoncello, Jeffer Eidi Sasaki, Moacir Marocolo, Nicolas Bueno Alves, Sheilla Tribess, Ciro José Brito and Jair Sindra Virtuoso Junior

J. Funct. Morphol. Kinesiol. 2026, 11(1), 41; https://doi.org/10.3390/jfmk11010041 - 19 Jan 2026

Viewed by 291

Abstract

Background: Prolonged sitting has been associated with adverse cardiovascular and neuromuscular responses; however, the temporal onset of these acute physiological changes remains unclear. This study aimed to determine the acute effects of prolonged sitting on blood flow, blood pressure, and muscle activity. Methods: [...] Read more.

Background: Prolonged sitting has been associated with adverse cardiovascular and neuromuscular responses; however, the temporal onset of these acute physiological changes remains unclear. This study aimed to determine the acute effects of prolonged sitting on blood flow, blood pressure, and muscle activity. Methods: A non-controlled clinical trial was conducted with 21 healthy adults (22.5 ± 1.60 years), both male and female. Participants remained seated continuously for three hours, with data collected every 20 min, including infrared thermography, blood pressure, and electromyographic activity. Skin temperature was measured using infrared thermography on the calf region of both legs, and the mean temperature was analyzed. Systolic and diastolic blood pressure were measured using an oscillometric device, and mean arterial pressure was subsequently calculated. Muscle activity was assessed through surface electromyography, using median frequency and root mean square values. Statistical analysis was performed using the Friedman test and the Durbin–Conover post hoc test, along with a subjective trend analysis of each variable over time. Results: A significant reduction was observed in both calf skin temperature and median frequency after 60 min of uninterrupted sitting (p < 0.05). Mean and systolic blood pressure exhibited an increasing trend after 160 min (p < 0.05). Conclusions: The exposure–response data from this study may contribute to the planning of future interventions aimed at refining recommendations for breaking up prolonged sitting periods. Full article

(This article belongs to the Special Issue Basis of Applied Kinesiology, Innovations and Clinical Applications in Musculoskeletal Health, 2nd Edition)

► Show Figures

Figure 1

23 pages, 404 KB

Open AccessArticle

The Health and Physical Education Curriculum: Does It Address Muscular Fitness?

by Andrew Sortwell, Rodrigo Ramirez-Campillo, Urs Granacher, Christopher Joyce, Pedro Forte, Daniel A. Marinho, Ricardo Ferraz and Kevin Trimble

J. Funct. Morphol. Kinesiol. 2026, 11(1), 40; https://doi.org/10.3390/jfmk11010040 - 18 Jan 2026

Viewed by 309

Abstract

Background: The World Health Organization and the Australian physical activity guidelines, in line with contemporary research, recommend regular muscle-strengthening activities for optimal muscular fitness in children and adolescents. However, the extent to which muscle-strengthening or muscular fitness receives curricular emphasis is unknown [...] Read more.

Background: The World Health Organization and the Australian physical activity guidelines, in line with contemporary research, recommend regular muscle-strengthening activities for optimal muscular fitness in children and adolescents. However, the extent to which muscle-strengthening or muscular fitness receives curricular emphasis is unknown in Australia. Objectives: To examine to what extent the Australian Health and Physical Education Curriculum, Foundation to Year 10 (AHPEC; F–10) addresses and/or promotes muscular fitness. Methods: This study involved a mixed-methods content analysis of the AHPEC F–10 using: (i) conceptual analysis to identify muscular fitness-related terms; and (ii) relational analysis to examine alignment between muscular fitness content and curriculum rationale/aims. A search of national and international physical activity guidelines and school-based muscular fitness intervention literature generated a keyword set to guide abstraction from the AHPEC. Curriculum aim, rationale, level descriptions, achievement standards and content were coded to determine the extent to which muscular fitness was embedded. Intercoder reliability was established via consensus meetings. Muscular fitness content coverage was quantified as the proportion of directly aligned muscular fitness relevant content points per stage and aggregated primary (F–6), secondary (7–10), and F–10 scores. Results: A review of 32 national and one international physical activity guidelines identified 88 muscular fitness activities in total, with some activities appearing in multiple guidelines; 53.1% of national guidelines did not provide explicit muscular fitness examples, and where examples existed, they emphasised accessible modes (e.g., climbing, bodyweight tasks, jumping, and lifting). Additionally, analysis of school-based muscular fitness intervention literature identified 22 distinct muscular fitness activities to guide abstraction. Muscular fitness was absent in the AHPEC rationale and aims, was largely inferred in primary years level description and achievement standards and became more explicit in secondary achievement standards. Direct alignment of content with muscular fitness was non-existent or low across stages of learning (Foundation = 0%, Stage 1 = 0%, Stage 2 = 6.1%, Stage 3 = 9.1%, Stage 4 = 8.6%, Stage 5 = 8.8%). Overall, muscular fitness content coverage averaged 3.8% in primary, 8.7% in secondary, and 5.4% across F–10. Conclusions: The AHPEC treats muscular fitness as a low priority in primary schooling and a minor content area in secondary, yielding developmental messaging that is less aligned with contemporary evidence and physical activity guidelines. Full article

(This article belongs to the Special Issue Tailoring Physical Activity for the Health and Development of Children and Adolescents)

14 pages, 640 KB

Open AccessArticle

Anthropometric Determinants of Rowing Performance in a Multinational Youth Cohort

by László Suszter, Zoltán Gombos, Ottó Benczenleitner, Ferenc Ihász and Zoltán Alföldi

J. Funct. Morphol. Kinesiol. 2026, 11(1), 39; https://doi.org/10.3390/jfmk11010039 - 17 Jan 2026

Viewed by 194

Abstract

Background: Rowing performance in youth athletes is strongly influenced by anthropometric characteristics, body composition, and limb proportions; however, the combined contribution of these factors across developmental stages remains insufficiently understood. This study investigated the relationships between key anthropometric variables and ergometer performance in [...] Read more.

Background: Rowing performance in youth athletes is strongly influenced by anthropometric characteristics, body composition, and limb proportions; however, the combined contribution of these factors across developmental stages remains insufficiently understood. This study investigated the relationships between key anthropometric variables and ergometer performance in a multinational cohort of young rowers. Methods: A total of 194 athletes (48 females, 146 males) from ten countries participated. Based on age and sex, participants were categorized into junior female (JF), junior male (JM), adult female (AF), and adult male (AM) groups. Body height, body mass, body fat (F%), relative muscle mass (M%), limb lengths, and body surface area (BSA) were measured. Rowing performance was assessed via maximal 2000 m ergometer trials. Results: Males outperformed females across all age groups (p < 0.001). Performance showed strong positive correlations with body height (r = 0.673, p = 0.003), body mass (r = 0.724, p = 0.005), arm span (r = 0.681, p = 0.002), lower-limb length (r = 0.394, p = 0.004), relative muscle mass (39.9 ± 5.2%; r = 0.531, p < 0.001), and especially BSA (1.94 ± 0.19 m²; r = 0.739, p < 0.001). Relative body fat was negatively associated with performance (17.6 ± 6.9%; r = −0.465, p < 0.001). Conclusions: Findings indicate that rowing performance in youth athletes reflects multidimensional anthropometric configurations rather than isolated traits, characterized primarily by the combined contribution of body surface area, relative muscle mass, and segmental body dimensions. From a practical perspective, higher-performing athletes typically exhibited body surface area values approaching or exceeding ~1.90 m² and relative muscle mass above ~40%, suggesting these ranges as indicative reference benchmarks rather than fixed selection thresholds. Integrating anthropometric profiling with physiological assessment may enhance early talent identification and support individualized training strategies in competitive youth rowing. Full article

(This article belongs to the Section Athletic Training and Human Performance)

► Show Figures