Journal of Functional Morphology and Kinesiology

12 pages, 4591 KB

Open AccessArticle

Toward a Better Understanding of Hip Adductor Function: Internal Rotation Capability Revealed by Anatomical and MRI Evaluation

by Kazuhiro Hirano, Kazuo Kinoshita, Atsushi Senoo and Masaru Watanabe

J. Funct. Morphol. Kinesiol. 2025, 10(3), 354; https://doi.org/10.3390/jfmk10030354 - 16 Sep 2025

Abstract

Background: At present, the rotational function of the hip adductor muscle group remains unclear. This study aimed to clarify the rotational function and stabilizing role of the pectineus, adductor longus, and adductor brevis (adductor muscle group) based on anatomical findings and T [...] Read more.

Background: At present, the rotational function of the hip adductor muscle group remains unclear. This study aimed to clarify the rotational function and stabilizing role of the pectineus, adductor longus, and adductor brevis (adductor muscle group) based on anatomical findings and T₂ values (ms) obtained from magnetic resonance imaging (MRI). T₂ values are prolonged in tissues with higher water content, and in skeletal muscle, it has been demonstrated that T₂ values increase in proportion to exercise intensity. Methods: Using fixed specimens (n = 6, aged 61–96 years), we observed the three-dimensional arrangement of muscles in the neutral position of the hip joint and observed the extension or shortening of muscles associated with passive maximum internal and external rotation of the hip joint. In addition, we evaluated the activity of the adductor muscle group by T₂ values (ms) from MRI pre- and post-internal rotation (forward step with the left leg) and pre- and post-external rotation (backward step with the left leg) movements of the right hip joint in a standing position (n = 8, healthy adult subjects, mean age 29.1 ± 5.3 years). Results: Regarding functional anatomy, the arrangement of the gluteus minimus and adductor muscle groups was almost parallel across the femoral neck. In the evaluation of adductor muscle group activity using MRI, the percent change in T₂ values (%) of the pectineus was 6.38 ± 1.35 pre- and post-internal rotation and 1.35 ± 0.71 pre- and post-external rotation, whereas that of the adductor longus and brevis was 4.84 ± 1.31 pre- and post-internal rotation and 1.31 ± 0.68 pre- and post-external rotation. The percent change in T₂ values pre- and post-internal rotation exercise was significantly greater than that pre- and post-external rotation exercise in the pectineus, adductor longus, and brevis muscles (p < 0.05). Conclusions: The adductor muscle groups are suggested to contribute to joint stability in the coronal plane and provide joint internal rotation in the standing position. Full article

(This article belongs to the Collection Feature Papers in Journal of Functional Morphology and Kinesiology)

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19 pages, 1150 KB

Open AccessArticle

Low-Intensity Virtual Reality Exercise for Caregivers of People with Mild Cognitive Impairment: A Pilot Study

by Maria Grazia Maggio, Raffaela Maione, Silvia Migale, Antonino Lombardo Facciale, Luca Pergolizzi, Piero Buonasera, Bartolo Fonti, Mirjam Bonanno, Giulia Pistorino, Paolo De Pasquale and Rocco Salvatore Calabrò

J. Funct. Morphol. Kinesiol. 2025, 10(3), 353; https://doi.org/10.3390/jfmk10030353 - 16 Sep 2025

Abstract

Background: Informal caregivers of individuals with mild cognitive impairment (MCI) experience high levels of psychological and physical stress, with limited access to supportive interventions and time constraints. Virtual Reality (VR) technologies may provide brief and accessible opportunities to support caregiver well-being, particularly during [...] Read more.

Background: Informal caregivers of individuals with mild cognitive impairment (MCI) experience high levels of psychological and physical stress, with limited access to supportive interventions and time constraints. Virtual Reality (VR) technologies may provide brief and accessible opportunities to support caregiver well-being, particularly during waiting periods in clinical settings. This pilot study aimed to explore the potential of a semi-immersive VR intervention to enhance psychological well-being in informal caregivers. Methods: This non-randomized pilot study investigated the effects of a semi-immersive VR-based physical training program (K-HERO^®) on psychological well-being and coping strategies in informal caregivers. Participants were recruited from January to May 2025 at the IRCCS Centro Neurolesi “Bonino-Pulejo” (Messina, Italy), and the intervention was delivered individually in a dedicated room within the rehabilitation facility, while caregivers accompanied their relatives to treatment sessions. Ten caregivers completed six sessions (30–40 min each). The study was conducted in accordance with TREND reporting guidelines. Pre- and post-intervention assessments included the State-Trait Anxiety Inventory (STAI), Perceived Stress Scale (PSS), COPE Inventory, Caregiver Burden Inventory (CBI), and International Physical Activity Questionnaire (IPAQ). Visual Analog Scales and instrumental data from the VR system were used to monitor physical performance and user experience. Non-parametric statistics were applied. Results: Significant reductions were observed in avoidance (p = 0.033) and social support-based (p = 0.023) coping strategies. Differences emerged based on caregiver-patient relationships: parental caregivers showed increased anxiety, while offspring caregivers showed improvements. The intervention was well tolerated, with high usability and no adverse events reported. Conclusions: A short, structured, VR-based intervention delivered during clinical waiting periods may effectively reduce maladaptive coping strategies and support emotional well-being in informal caregivers. These findings highlight the potential of brief digital interventions in real-world care contexts. Larger randomized studies are needed to validate these preliminary findings and personalize interventions to different caregiver profiles. Full article

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

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10 pages, 232 KB

Open AccessBrief Report

Exploring the Impact of Pickleball for Improving Mood in First-Year University Students—A Pilot Study in Japan

by Max Nghiem Lee, Michael Benjamin Fung and Goichi Hagiwara

J. Funct. Morphol. Kinesiol. 2025, 10(3), 352; https://doi.org/10.3390/jfmk10030352 - 14 Sep 2025

Abstract

Background: Pickleball has gained global popularity as a socially engaging and accessible sport, but little is known about its short-term psychological effects on younger populations, particularly university students. This pilot study examines whether participation in a pickleball class during a university course [...] Read more.

Background: Pickleball has gained global popularity as a socially engaging and accessible sport, but little is known about its short-term psychological effects on younger populations, particularly university students. This pilot study examines whether participation in a pickleball class during a university course produces immediate mood improvements among Japanese first-year students. Methods: A total of 106 sports science students (75 men and 31 women; M = 18.44, SD = 0.55) participated in a 100 min pickleball tournament. Mood states were measured pre- and post-activity using a Two-Dimensional Mood Scale (TDMS) to assess vitality, stability, pleasure, and arousal. A mixed-design ANOVA (time × gender) was used for analysis. Results: A significant main effect of time was found for vitality (F(1,103) = 4.97, p = 0.028, η² = 0.046), indicating improved vitality after participation. Other mood indices showed positive but non-significant trends (pleasure: p = 0.127; arousal: p = 0.067; stability: p = 0.812). No significant main effects of gender or time × gender interactions were observed. Qualitative responses supported these findings, with 64% of participants describing the activity as “fun” or “good” and 24% referencing social themes such as “cooperation” and “exchange”. Conclusions: Short-term participation in pickleball during a university class improved vitality and fostered social enjoyment among first-year students, with broadly similar benefits for men and women. As a pilot study, the findings highlight pickleball’s potential as a low-barrier, socially interactive activity to support students’ mental health in educational settings, although future studies with diverse samples and controlled designs are needed. Full article

(This article belongs to the Special Issue Physical Activity for Optimal Health: 2nd Edition)

15 pages, 659 KB

Open AccessArticle

Recovery After an Official Soccer Match: An Analysis of Markers of Muscle Damage and Oxidative Stress, and Endocrine, Neuromuscular and Perceptual Responses

by Diego Marqués-Jiménez, Miguel Ramirez-Jimenez, José M. Izquierdo, José Losa-Reyna, Domingo Machuca Calvo, Jorge López-López and Daniel Castillo

J. Funct. Morphol. Kinesiol. 2025, 10(3), 351; https://doi.org/10.3390/jfmk10030351 - 13 Sep 2025

Abstract

Objectives: This study analysed the recovery process after an official soccer match by monitoring changes in markers of muscle damage and oxidative stress, and endocrine, neuromuscular, and perceptual responses. Methods: This repeated-measures observational study included thirteen male amateur soccer players. Blood [...] Read more.

Objectives: This study analysed the recovery process after an official soccer match by monitoring changes in markers of muscle damage and oxidative stress, and endocrine, neuromuscular, and perceptual responses. Methods: This repeated-measures observational study included thirteen male amateur soccer players. Blood biomarkers, neuromuscular performance in countermovement jump, and perceived wellness were measured at four time-points: the morning of the match-day, immediately post-, and 24 h and 48 h post-match. Results: Except for CK, which remained elevated at 48 h post-match, lactate dehydrogenase, C-reactive protein, uric acid, testosterone, cortisol, and testosterone to cortisol ratio returned to baseline between 24 h and 48 h post-match (p < 0.05). Jump height was significantly decreased at 24 h and 48 h post-match, while peak rate of force development and other countermovement jump time-based metrics (i.e., time to take off, time to peak force, reactive strength index modified, flight time to contraction time ratio) were impaired immediately after the match and recovered earlier (p < 0.05). Peak values for perceived fatigue and delayed onset muscle soreness were observed immediately post- and at 24 h post-match, respectively (p < 0.05). Conclusions: While certain physiological, neuromuscular, and perceptual changes may return to baseline levels within 24 h or 48 h post-match, amateur soccer players still manifest exercise-induced muscle damage symptoms and can be considered fatigued after a 48 h recovery period. Full article

(This article belongs to the Special Issue Muscle Stress and Damage in Sport and Exercise)

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14 pages, 445 KB

Open AccessArticle

Notational Analysis of the Final Matches of the 2023 IBA Women’s World Boxing Championships

by Francesca Martusciello, Andrea Perazzetti, Arben Kaçurri, Marco Consolati and Antonio Tessitore

J. Funct. Morphol. Kinesiol. 2025, 10(3), 350; https://doi.org/10.3390/jfmk10030350 - 12 Sep 2025

Abstract

Background: Recently, elite women’s boxing has undergone significant structural and regulatory changes, including the adoption of the 3 × 3-min-bout format and expanded Olympic categories. Despite increased female participation, scientific literature remains predominantly focused on male athletes. This study aimed to identify the [...] Read more.

Background: Recently, elite women’s boxing has undergone significant structural and regulatory changes, including the adoption of the 3 × 3-min-bout format and expanded Olympic categories. Despite increased female participation, scientific literature remains predominantly focused on male athletes. This study aimed to identify the technical and tactical actions that distinguish winner from loser boxers in elite amateur women’s boxing by analysing the final matches of the 2023 IBA Women’s World Boxing Championships. Methods: Twelve final bouts (one per weight-category) were analysed using a customised notational framework based on the offensive–defensive interaction cycle. A total of 1323 offensive and 1456 defensive actions were recorded and categorised using Kinovea (0.9.5 release) software and an Excel dashboard. Offensive Effectiveness Ratio (OER) and Defensive Effectiveness Ratio (DER) were calculated, and Chi-square tests with standardised residuals were applied to detect associations between action types and bout outcomes. Results: Winners performed fewer offensive actions (n = 635) than losers (n = 688) but demonstrated significantly higher OER across all rounds (W: 0.39-0.38-0.39; L: 0.26-0.28-0.29). Winners landed more punches to the head and made greater use of rear-hand hooks and uppercuts. Pivoting and shifting back, particularly when followed by counterattacks, were significantly associated with winners (p < 0.001). Conversely, parrying and single counterpunches were linked to losing outcomes. DER values suggested superior defensive efficiency among winners. Conclusions: Winner boxers showed superior technical effectiveness, selective use of single and rear-hand punches and used more dynamic defensive strategies. These findings support using notational analysis in high-performance coaching and emphasise the need for more research on elite female combat athletes. Full article

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

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11 pages, 616 KB

Open AccessArticle

Acute Blood Pressure Changes Following Resistance Exercise in Adults with Hypertension

by Luis A. Benavides-Roca, Germán Parra and Antonio R. Zamunér

J. Funct. Morphol. Kinesiol. 2025, 10(3), 349; https://doi.org/10.3390/jfmk10030349 - 12 Sep 2025

Abstract

Objective: This study aimed to determine the acute effects of specific exercises, commonly used in resistance training programs, performed at two intensities (low and high) with equal volume, on blood pressure in individuals with pharmacologically controlled hypertension. Methods: A crossover clinical [...] Read more.

Objective: This study aimed to determine the acute effects of specific exercises, commonly used in resistance training programs, performed at two intensities (low and high) with equal volume, on blood pressure in individuals with pharmacologically controlled hypertension. Methods: A crossover clinical trial was conducted with 26 participants with hypertension, each completing two resistance training sessions, one low-intensity and one high-intensity, including squats, rows, deadlifts, and bench presses. The exercise intensity for the first session was randomly assigned, and blood pressure was measured using an automated device before and immediately after each exercise. Comparisons between baseline and post-exercise values were analyzed, with a significance level set at 5%. Results: The results showed that systolic blood pressure (SBP) increased during squats, rows, and deadlifts compared to baseline, with the deadlift producing the highest values. For diastolic blood pressure (DBP), no significant differences were observed from baseline, but the squat and deadlift elicited higher values than the rows and bench press. Additionally, high-intensity training resulted in lower DBP values compared to the low-intensity protocol. Conclusion: Resistance exercise increases SBP regardless of intensity, with the squat and deadlift producing the most significant changes, while high-intensity training leads to lower DBP values than low-intensity protocols in the studied participants. Full article

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

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19 pages, 777 KB

Open AccessArticle

Impact of a 24-Week Workplace Physical Activity Program on Oxidative Stress Markers, Metabolic Health, and Physical Fitness: A Pilot Study in a Real-World Academic Setting

by Gabriele Maisto, Maria Scatigna, Simona Delle Monache, Maria Francesca Coppolino, Lorenzo Pugliese, Anna Maria Sponta, Loreta Tobia, Elio Tolli, Pierfrancesco Zito, Valerio Bonavolontà, Leila Fabiani, Chiara Tuccella and Maria Giulia Vinciguerra

J. Funct. Morphol. Kinesiol. 2025, 10(3), 348; https://doi.org/10.3390/jfmk10030348 - 12 Sep 2025

Abstract

Background: Previous studies showed that workplace physical activity programs (WPAPs) could improve general health among employees. However, there is a lack of correlation between oxidative redox status and the metabolic and physical fitness (PF) of workers. The objective of the study was [...] Read more.

Background: Previous studies showed that workplace physical activity programs (WPAPs) could improve general health among employees. However, there is a lack of correlation between oxidative redox status and the metabolic and physical fitness (PF) of workers. The objective of the study was to evaluate the improvements of a 24-week combined circuit training and mobility training program on PF, oxidative redox status, and metabolic parameters on healthy academic employees. Methods: Twenty-six university employees (52.8 ± 11.5 years) followed a 24-week WPAP composed of two circuit training sessions and one mobility training session per week. PF components were assessed through one leg stand, shoulder/neck mobility, handgrip, dynamic sit-up, jump and reach, and 2-Minute step test (2MST). Oxidative stress and antioxidant potential were evaluated through derived-Reactive Oxygen Metabolites (d-ROM) and biological antioxidant potential (BAP) tests, respectively. Metabolic measurements included total cholesterol, LDL-C, HDL-C, triglycerides, and fasting plasma glucose. All assessments were conducted at baseline and after 24 weeks. Results: D-ROM values increased significantly likely due to an acute adaptive response to exercise and a stable BAP/d-ROM ratio was maintained. At baseline, subjects with higher 2MST scores showed a better BAP/d-ROM ratio compared to those with lower 2MST scores, which was also associated with normal weight status (p < 0.05), healthy values of triglycerides (p < 0.01), and LDL-C (p < 0.01). Excluding statin-treated subjects, an intriguing shift toward a condition of enhanced antioxidant capacity was observed. Conclusions: Overall, the 24-week WPAP improved metabolic health and maintained redox balance, despite increased reactive oxygen species (ROS) production. Statin supplementation may have hidden antioxidant adaptations to physical exercise, an intriguing observation that warrants further studies. Full article

(This article belongs to the Special Issue Sports Medicine and Public Health)

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10 pages, 882 KB

Open AccessArticle

Post-Activation Performance Enhancement of Lower Limb with Variable Resistance Back Squat at Different Depths

by Choon Yeow Ng and Danny Lum

J. Funct. Morphol. Kinesiol. 2025, 10(3), 347; https://doi.org/10.3390/jfmk10030347 - 11 Sep 2025

Abstract

Background: This study compared the acute effect of performing quarter (QS) and parallel (PS) squat with variable resistance (VR) on countermovement jump (CMJ) performance. Methods: Fifteen resistance trained athletes (age: 27.0 ± 3.7 years, bodyweight: 68.4 ± 7.7 kg, height: 169.7 ± 6.9 [...] Read more.

Background: This study compared the acute effect of performing quarter (QS) and parallel (PS) squat with variable resistance (VR) on countermovement jump (CMJ) performance. Methods: Fifteen resistance trained athletes (age: 27.0 ± 3.7 years, bodyweight: 68.4 ± 7.7 kg, height: 169.7 ± 6.9 cm) performed either the QS or PS to induce post-activation performance enhancement on two separate occasions. During each session, participants performed three repetitions of baseline CMJ prior to performing three repetitions of either QS or PS at their three-repetition maximum load. Participants then performed the post-test CMJ after a five-minute recovery period. Results: Both conditions resulted in increased jump height (QS: p < 0.001, g = 0.19, PS: p < 0.001, g = 0.35). Countermovement depth and time to take-off were significantly decreased in QS (p < 0.001, g = 0.63 and p = 0.005, g = 0.30, respectively) but significantly increased in PS (p = 0.027, g = 0.39 and p < 0.001, g = 0.36, respectively). Mean propulsion force was significantly increased in QS (p < 0.001, g = 0.23) but significantly decreased in PS (p = 0.083, g = 0.13). PS resulted in greater change in jump height (p < 0.001, g = 1.34) and time to take-off (p = 0.005, g = 1.25), while QS resulted in greater change in countermovement depth (p < 0.001, g = 2.33) and mean propulsion force (p < 0.001, g = 1.67). Conclusions: The results showed that performing PS and QS with VR was effective in enhancing CMJ height. However, the two conditions resulted in participants adopting different jump strategies when performing the post-test CMJ. Full article

(This article belongs to the Section Kinesiology and Biomechanics)

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10 pages, 783 KB

Open AccessArticle

Comparison of Metabolic and Pulmonary Variables Between Real-Life and Mixed Reality Pickleball

by Setareh Zarei, Matahn Blank, Jamaal Bovell, Dustin W. Davis, Jacob Baca, Michael W. H. Wong, Brett Abarbanel and James W. Navalta

J. Funct. Morphol. Kinesiol. 2025, 10(3), 346; https://doi.org/10.3390/jfmk10030346 - 11 Sep 2025

Abstract

Background: Pickleball is one of the fastest growing sports, and the use of virtual reality is also fast growing. Because the physiological responses in real life (IRL) vs. virtual reality are unknown, the purpose of this research was to compare heart rate, metabolic [...] Read more.

Background: Pickleball is one of the fastest growing sports, and the use of virtual reality is also fast growing. Because the physiological responses in real life (IRL) vs. virtual reality are unknown, the purpose of this research was to compare heart rate, metabolic and pulmonary measures IRL vs. mixed reality (MR) during pickleball activity. Methods: Eleven adult participants were outfitted with a portable metabolic unit, heart rate monitor, and virtual reality headsets. Participants played simulated pickleball for 5 min IRL and 5 min in MR. Dependent variables included average heart rate (HR [beats per minute (bpm)], ventilation (VE [L/min]), tidal volume (VT [L]), respiratory frequency (Rf [breaths per min]), respiratory exchange ratio (RER), percent of calories from fat (FAT%), percent of calories from carbohydrate (CHO%), energy expenditure (EE [kilocalorie (kcal]), and VO₂ (mL/kg/min). Data were analyzed using paired t-tests with significance accepted at p < 0.05. Effect size measurements were determined by interpretation of small (d = 0.2), medium (d = 0.5), and large (d = 0.8). Results: All metabolic and pulmonary variables except for FAT% were higher during IRL when compared with MR with effect sizes ranging from median to large. Conclusions: The results of this study provide evidence that playing pickleball IRL results in greater physiological responses in comparison to MR. Since MR demands less exertion and substrate use than IRL this result can be beneficial for training purposes with the added potential of reduced injury. Full article

(This article belongs to the Special Issue Advances in Physiology of Training—2nd Edition)

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11 pages, 2915 KB

Open AccessArticle

Electromyographic Analysis of Back Muscle Activation During Lat Pulldown Exercise: Effects of Grip Variations and Forearm Orientation

by Andrea Buonsenso, Domenico Di Fonza, Gloria Di Claudio, Massimiliano Carangelo, Marco Centorbi, Alessandra di Cagno, Giuseppe Calcagno and Giovanni Fiorilli

J. Funct. Morphol. Kinesiol. 2025, 10(3), 345; https://doi.org/10.3390/jfmk10030345 - 11 Sep 2025

Abstract

Objectives: The lat pulldown machine is one of the most versatile pieces of equipment for back strengthening, allowing variations in grip and load. However, there are significant gaps in the literature regarding the relationship between exercise modality and specific muscle activation. Methods [...] Read more.

Objectives: The lat pulldown machine is one of the most versatile pieces of equipment for back strengthening, allowing variations in grip and load. However, there are significant gaps in the literature regarding the relationship between exercise modality and specific muscle activation. Methods: This study examined the electromyographic (EMG) activity of major back muscles during seven lat pulldown exercise variants that differed in grip type, width, and trunk inclination. Forty male subjects, with at least 5 years of resistance training experience, performed five repetitions of lat pulldown exercise using 70% of their repetition maximum. Prior to the surface EMG analysis, maximal voluntary contraction (MVC) tests were performed for each muscle group analysed, specifically the latissimus dorsi, posterior deltoid, brachial biceps, middle and lower trapezium, and infraspinatus. The normalised root mean square of the EMG (NrmsEMG) activity for each muscle was recorded during full, concentric, and eccentric movements. Results: Multivariate analysis of variance (MANOVA) showed no significant difference in the NrmsEMG muscle activation across the different lat pulldown exercise variations (all p > 0.05). A significant difference was found in the posterior deltoid where the wide-pronated grip with a 30° trunk inclination showed greater EMG activation compared to the wide pronated grip (p = 0.011) and wide neutral grip (p = 0.017). Conclusions: These findings suggest that grip variations may not significantly alter latissimus dorsi recruitment, challenging the assumption that grip effectiveness targets this muscle. The results highlight the need for individualised approaches to exercise selection, given the variability in muscle activation patterns observed. Full article

(This article belongs to the Special Issue Biomechanical Analysis in Physical Activity and Sports—2nd Edition)

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14 pages, 1044 KB

Open AccessArticle

Protective Gear Negatively Impacts Police Officer Mobility, Stability, and Power Generation

by Katherine A. Frick, Philip J. Agostinelli, Frances K. Neal, Nicholas C. Bordonie, C. Brooks Mobley and JoEllen M. Sefton

J. Funct. Morphol. Kinesiol. 2025, 10(3), 344; https://doi.org/10.3390/jfmk10030344 - 9 Sep 2025

Abstract

Background: Protective gear is a critical part of the police officer uniform. The required protective gear weighs over 9 kg and is rigid and bulky, creating deficits in physical performance essential for completing officer’s daily tasks and increasing risk of injury. Understanding the [...] Read more.

Background: Protective gear is a critical part of the police officer uniform. The required protective gear weighs over 9 kg and is rigid and bulky, creating deficits in physical performance essential for completing officer’s daily tasks and increasing risk of injury. Understanding the impedance the protective gear causes and how physical factors such as body composition increase this effect is critical to the safety and survival of the police officer. The purpose of this study was to evaluate the impact of protective gear on officer capabilities. Methods: Officers completed an 11-point assessment in two conditions: athletic attire (No Gear) and uniform + protective equipment (Gear). Results: Differences in power output (p < 0.001; p = 0.118), balance (p < 0.001; p = 0.771), functional movement (p = 0.002; p = 0.018), and flexibility (p < 0.001) were found between the two conditions. Conclusions: Decreased on-duty performance can affect officer safety and success. These results indicate the need for continued improvement of police officer safety equipment to ensure mobility and safety. Full article

(This article belongs to the Special Issue Tactical Athlete Health and Performance)

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14 pages, 921 KB

Open AccessArticle

Acute Effects of Isometric Contraction Distribution on Jump Performance in Volleyball Players

by Jonatan Helbin, Dawid Gawel, Artur Terbalyan, Michal Wilk, Michal Krzysztofik, Danny Lum and Jakub Jarosz

J. Funct. Morphol. Kinesiol. 2025, 10(3), 343; https://doi.org/10.3390/jfmk10030343 - 9 Sep 2025

Abstract

Objectives: This study evaluated how different distributions of isometric conditioning activity (ICA) durations affect countermovement jump (CMJ) performance in highly trained male volleyball players compared to a control condition (CTRL). Methods: Twelve participants performed CTRL and three ICA protocols in a half-back squat: [...] Read more.

Objectives: This study evaluated how different distributions of isometric conditioning activity (ICA) durations affect countermovement jump (CMJ) performance in highly trained male volleyball players compared to a control condition (CTRL). Methods: Twelve participants performed CTRL and three ICA protocols in a half-back squat: 9 s (3 × 1 × 3 s), 27 s (3 × 3 × 3 s), and 45 s (3 × 5 × 3 s). CMJ height was measured before and at 3, 6, 9, and 12 min post ICA. Results: A two-way repeated measures ANOVA showed significant main effects of time (F = 3.820; p = 0.009) and condition (F = 6.451; p = 0.001), with no significant interaction (F = 1.484; p = 0.138). Post hoc analysis indicated significant CMJ height increases at 9 min [mean difference (MD) = 5.1 ± 0.6 cm; p = 0.045] and 12 min (MD = 6.0 ± 1.4 cm; p = 0.010) post ICA. Moreover, CMJ height was significantly greater in the 27 s (MD = 10.0 ± 0.6 cm; p = 0.002) and 45 s (MD = 7.3 ± 2.0 cm; p = 0.035) conditions compared to the 9 s protocol. Conclusions: Incorporating ICAs of 9 s or 45 s into warm-up routines can enhance CMJ performance, although these durations may elicit different neuromuscular adaptations and movement strategies. Full article

(This article belongs to the Special Issue Optimizing Post-Activation Performance Enhancement: 2nd Edition)

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13 pages, 632 KB

Open AccessArticle

Impact of Aerobic Capacity on Mechanical Variables in Track Sprinters and Middle-Distance Runners: A Comparative Study

by Nikolaos P. Belechris, Gregory C. Bogdanis, Elias Zacharogiannis, Athanasios Tsoukos and Giorgos Paradisis

J. Funct. Morphol. Kinesiol. 2025, 10(3), 342; https://doi.org/10.3390/jfmk10030342 - 9 Sep 2025

Abstract

Background: This study examined the impact of aerobic capacity on force–velocity (F–v) variables and repeated-sprint (RS) performance in male national-level sprinters (SPRs, n = 8; 177.0 ± 4.3 cm; 74.0 ± 5.0 kg; maximal oxygen uptake [VO₂max]: 55.4 ± 3.0 mL/kg/min) [...] Read more.

Background: This study examined the impact of aerobic capacity on force–velocity (F–v) variables and repeated-sprint (RS) performance in male national-level sprinters (SPRs, n = 8; 177.0 ± 4.3 cm; 74.0 ± 5.0 kg; maximal oxygen uptake [VO₂max]: 55.4 ± 3.0 mL/kg/min) and middle-distance runners (MDRs; n = 8; 179.0 ± 5.1 cm; 67.2 ± 5.0 kg; VO₂max: 64.3 ± 3.3 mL/kg/min). Method: Participants underwent assessments of aerobic capacity, mechanical F-v profiling in sprinting 2 × 60 m with full recovery, and a 10 × 60 m repeated-sprint test with 30 s recovery. Results: MDRs exhibited significantly higher VO₂max (p < 0.001) and speed at VO₂max (vVO₂max, p < 0.001), while SPRs demonstrated greater anaerobic speed reserve (ASR, p < 0.001), maximal theoretical horizontal force (F₀, p = 0.012), and power output (P_max, p < 0.01). During the RS test, SPRs displayed a 16.6% performance decrement (p = 0.002) and failed to complete all sprints with voluntary withdrawal after 5–8 sprints due to exhaustion, whereas MDRs maintained consistent performance. SPRs exhibited a larger decrease in v₀ compared to MDRs (p < 0.01), whereas no differences were observed on F₀ (p = 0.519) and P_max (p = 0.758). Blood lactate accumulation was higher in SPRs (p < 0.001). Multiple linear regression analysis on the pooled sample identified vVO₂max (p = 0.003) and not ASR (p = 0.482) as a key predictor of fatigue resistance. Conclusions: These findings underscore the critical role of aerobic capacity in sustaining RS performance. Aerobic capacity, specifically vVO₂max, emerged as the primary determinant of fatigue resistance during repeated sprints, underscoring its critical role in sustaining RS performance over mechanical variables such as v₀ but not F₀ and P_max. Full article

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

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13 pages, 935 KB

Open AccessArticle

Personalized Physical Exercise Program Among Adolescent Girls: A Pilot Study

by Peter Petrovics, Balazs Sebesi, Zsolt Szekeres, Eszter Szabados and Anita Pálfi

J. Funct. Morphol. Kinesiol. 2025, 10(3), 341; https://doi.org/10.3390/jfmk10030341 - 6 Sep 2025

Abstract

Objectives: Adolescence is a pivotal stage of development characterized by significant physical, psychological, and social changes. Establishing healthy lifestyle habits during this period is crucial for long-term health and the prevention of chronic diseases. Despite this, global trends show a marked decline in [...] Read more.

Objectives: Adolescence is a pivotal stage of development characterized by significant physical, psychological, and social changes. Establishing healthy lifestyle habits during this period is crucial for long-term health and the prevention of chronic diseases. Despite this, global trends show a marked decline in physical activity among adolescents, particularly girls, who are more susceptible to sedentary behaviors. One potential site for intervention to eliminate physical inactivity at the population level is the school educational setting during childhood. Traditional school-based physical exercise programs often adopt a one-size-fits-all approach, which may not address the diverse needs and interests of students, leading to reduced motivation and participation. Personalized physical exercise programs, tailored to individual capabilities and preferences, offer a promising alternative to enhance physical fitness and foster lifelong engagement in physical activity. Methods: A total of 170 Hungarian high school girls (mean age ≈ 15.3 years) were randomly assigned to either a personalized physical exercise group or a control group following the standard curriculum. The intervention spanned two academic years and consisted of five traditional gym classes per week (control group) or three traditional and two individually tailored classes with cardiorespiratory and resistance training per week (intervention group), each lasting 45–60 min. Individual goals were set based on baseline assessments, emphasizing self-referenced progress. Results: The personalized physical exercise group showed significant improvements in body mass index (BMI), body fat percentage, maximum oxygen uptake capacity (VO₂max), muscular strength, and flexibility (p < 0.05), while the control group exhibited minimal or negative changes. Conclusions: The personalized physical exercise program has been shown to be more effective in achieving higher cardiorespiratory performance and favorable body composition among adolescent girls than a traditional school physical education class, highlighting its potential role in school settings. Full article

(This article belongs to the Special Issue Advances in Physiology of Training—2nd Edition)

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13 pages, 262 KB

Open AccessArticle

Effects of a Moderate-Intensity Interval Training Protocol on University Students’ Body Composition: A Pilot Study

by Bastian Parada-Flores, Luis Valenzuela-Contreras, Cristian Martínez-Salazar, Pablo Luna-Villouta, Daniela Lara-Aravena, Constanza Pino-Bárcena, Sofía Saavedra-Godoy, Álvaro Levín-Catrilao and Rodrigo Vargas-Vitoria

J. Funct. Morphol. Kinesiol. 2025, 10(3), 340; https://doi.org/10.3390/jfmk10030340 - 5 Sep 2025

Abstract

Background: Unhealthy lifestyles have been reported among university students, characterized by excess body weight and physical inactivity, which affects body composition and increases the risk of non-communicable diseases. Physical exercise (PE) is an effective strategy for body reshaping; however, its demands and [...] Read more.

Background: Unhealthy lifestyles have been reported among university students, characterized by excess body weight and physical inactivity, which affects body composition and increases the risk of non-communicable diseases. Physical exercise (PE) is an effective strategy for body reshaping; however, its demands and difficulties make its practice complex. Therefore, there was an interest in investigating the effects of a low-volume, moderate-intensity interval training (MIIT) protocol. Methods: A 5-week quasi-experimental study was conducted. Twelve university students (ten women and two men), aged 22 ± 3.4 years, engaged in low-level physical activity. The intervention group (n = 6) performed a MIIT protocol of 1′ × 1′ × 7′ (seven series of 1 min of moderate-intensity exercise interleaved with a recovery period of 1 min) three times a week, while the control group (n = 6) continued with its regular activities. Results: Significant improvements were reported in body fat percentage (%BF) (p = 0.04; d = 0.9), fat mass (FM) (p = 0.00; d = 0.7) and recovery heart rate (RHR) (p = 0.001); d = 1) in the MIIT group compared with the pre-test and control group values. Furthermore, the body weight (p = 0.04) and body mass index (BMI) (p = 0.04) values also improved in the MIIT group, compared to the pre-test values. Conclusions: MIIT is an effective strategy for short-term improvement in body composition, as well as in anthropometric measures and fitness parameters, in university students with a low PAL. Its ease of applicability—based on low exercise volume and intensity—is notable, making it feasible of incorporation into student health programs. Full article

(This article belongs to the Special Issue Effects of Exercise Training on Cardiovascular Risks Factors in Primary and Secondary Prevention)

17 pages, 1175 KB

Open AccessArticle

Changes in Sprinting and Jumping Performance During Preseason in Professional Basketball Players

by Álvaro de Pedro-Múñez, Tania Álvarez-Yates, Virginia Serrano-Gómez and Oscar García-García

J. Funct. Morphol. Kinesiol. 2025, 10(3), 339; https://doi.org/10.3390/jfmk10030339 - 5 Sep 2025

Abstract

Objectives: Sprinting and jumping abilities are key determinants of basketball performance. This study aims to analyze changes in sprinting and jumping performance among professional basketball players during the preseason and to determine whether these adaptations are influenced by specific playing positions (Guards [...] Read more.

Objectives: Sprinting and jumping abilities are key determinants of basketball performance. This study aims to analyze changes in sprinting and jumping performance among professional basketball players during the preseason and to determine whether these adaptations are influenced by specific playing positions (Guards vs. Bigs). Methods: A total of 106 professional basketball players from European leagues were evaluated twice over a 6-week preseason. Neuromuscular assessments included linear sprints (5, 10, and 20 m), a change of direction test, curved sprints, and multiple jump tests: Squat Jump (SJ), Countermovement Jump (CMJ), Single-Leg CMJ (SL-CMJ) and Arm-Swing CMJ (CMJA), Single Leg Hop for Distance (SHDJ), Lateral Bound Jump (LBJ), and Single-Leg Repeated Jumps (SLRJ). The training program integrated 6–8 weekly basketball-specific technical–tactical sessions with two to three strength and conditioning sessions targeting maximal strength, power, and hypertrophy. Results: Players significantly improved linear and curved sprint performance, and jumping ability, particularly CMJ, CMJA, and right-leg SHDJ. Minimal changes were observed in SJ, LBJ, and SLRJ. Positional differences were small, with Guards showing greater gains in CMJA than Bigs (6.85% vs. 1.87%). Conclusions: A 6-week preseason training program may be associated with improvements in sprinting (linear 5, 10, 20 m, and curved sprint) and vertical jump performance (CMJ, CMJA, SHDJ) in professional basketball players, with limited influence of playing position. Guards appear to benefit more from arm-swing vertical jump development. Full article

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

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13 pages, 2038 KB

Open AccessArticle

Evaluating the Effects of a Progressive Kinesiotaping Treatment Protocol on Chronic Low Back Pain in Women Using Electroencephalography

by Ana Carolina F. T. Del Antonio, Tiago T. Del Antonio, Marieli Ramos Stocco, Alex Silva Ribeiro, Nelson Morini Junior, Adriana Bovi, Claudia S. Oliveira, Deise A. A. P. Oliveira, Dante B. Santos, Iransé Oliveira-Silva, Rodrigo F. Oliveira, Luís V. F. Oliveira, Luciana Prado Maia and Rodrigo A. C. Andraus

J. Funct. Morphol. Kinesiol. 2025, 10(3), 338; https://doi.org/10.3390/jfmk10030338 - 3 Sep 2025

Abstract

Objectives: The central nervous system plays a fundamental role in chronic pain; however, its behavior in this condition remains unclear, especially when associated with interventions such as kinesiotaping (KT). This study aimed to analyze the effects of KT on the somatosensory cortex [...] Read more.

Objectives: The central nervous system plays a fundamental role in chronic pain; however, its behavior in this condition remains unclear, especially when associated with interventions such as kinesiotaping (KT). This study aimed to analyze the effects of KT on the somatosensory cortex of women with chronic low back pain. Methods: This case series involved 15 women with chronic low back pain. Participants underwent a progressive-tension KT protocol for 8 weeks, and electroencephalogram recordings were performed in two positions, namely sitting and standing while load bearing (10% of body weight), in the first and eighth weeks. The following instruments were employed: Oswestry lumbar disability index, fear avoidance beliefs questionnaire, and the numerical pain intensity scale. Results: All participants showed significant pain improvement and a reduction in Oswestry disability index scores from moderate to minimal. Additionally, activity in the alpha band within the somatosensory cortex and insula (central region—represented by the electrode Cz) decreased. This was confirmed by reduced power spectral density, indicating diminished cortical activity in these regions. Conclusions: KT positively affects women with chronic low back pain, providing pain reduction and improved functional capacity, as indicated by the fear avoidance beliefs questionnaire and numerical pain intensity scale. Moreover, KT reduces cortical activity in the somatosensory cortex, which is related to the progression of painful sensations, described above after the intervention. Full article

(This article belongs to the Special Issue Sports Medicine and Public Health)

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13 pages, 325 KB

Open AccessArticle

Predicting Sleep Quality Based on Metabolic, Body Composition, and Physical Fitness Variables in Aged People: Exploratory Analysis with a Conventional Machine Learning Model

by Pedro Forte, Samuel G. Encarnação, José E. Teixeira, Luís Branquinho, Tiago M. Barbosa, António M. Monteiro and Daniel Pecos-Martín

J. Funct. Morphol. Kinesiol. 2025, 10(3), 337; https://doi.org/10.3390/jfmk10030337 - 2 Sep 2025

Abstract

Background: Sleep plays a crucial role in the health of older adults, and its quality is influenced by multiple physiological and functional factors. However, the relationship between sleep quality and physical fitness, body composition, and metabolic markers remains unclear. This exploratory study [...] Read more.

Background: Sleep plays a crucial role in the health of older adults, and its quality is influenced by multiple physiological and functional factors. However, the relationship between sleep quality and physical fitness, body composition, and metabolic markers remains unclear. This exploratory study aimed to investigate the associations between sleep quality and physical, metabolic, and body composition variables in older adults, and to evaluate the preliminary performance of a logistic regression model in classifying sleep quality. Methods: A total of 32 subjects participated in this study, with a mean age of 69. The resting arterial pressure (systolic and diastolic), resting heart rate, anthropometrics (high waist girth), body composition (by bioimpedance), and physical fitness (Functional Fitness Test) and sleep quality (Pitsburg sleep-quality index) were evaluated. Group comparisons, associative analysis and logistic regression with 5-fold stratified cross-validation was used to classify sleep quality based on selected non-sleep-related predictors. Results: Individuals with good sleep quality showed significantly better back stretch (t = 2.592; p = 0.015; η² = 0.239), lower limb strength (5TSTS; t = 2.564; p = 0.016; η² = 0.476), and longer total sleep time (t = 6.882; p < 0.001; η² = 0.675). Exploratory correlations showed that poor sleep quality was moderately associated with reduced lower-limb strength and mobility. The logistic regression model including 5TSTS and TUG achieved a mean accuracy of 0.76 ± 0.15, precision of 0.79 ± 0.18, recall of 0.83 ± 0.21, and AUC of 0.74 ± 0.16 across cross-validation folds. Conclusions: These preliminary findings suggest that physical fitness and clinical variables significantly influence sleep quality in older adults. Sleep-quality-dependent patterns suggest that interventions to improve lower limb strength may promote better sleep outcomes. Full article

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

10 pages, 735 KB

Open AccessCase Report

Pregnancy and Lactation-Associated Osteoporosis: Combined Pharmacological and Rehabilitative Management

by Rossana Gnasso, Ayda Tavakkolifar, Andrea Esposito, Antonella Malinconico, Giuseppe Esposito, Lucia Taddeo, Stefano Palermi, Alessandro Nunzio Velotti, Antonio Picone and Carlo Ruosi

J. Funct. Morphol. Kinesiol. 2025, 10(3), 336; https://doi.org/10.3390/jfmk10030336 - 31 Aug 2025

Abstract

Background: Pregnancy and lactation-associated osteoporosis is a rare cause of severe skeletal fragility in young women typically presenting with vertebral compression fractures during late pregnancy or postpartum. Its rarity and lack of risk factors often delay diagnosis. Case presentation: The patient [...] Read more.

Background: Pregnancy and lactation-associated osteoporosis is a rare cause of severe skeletal fragility in young women typically presenting with vertebral compression fractures during late pregnancy or postpartum. Its rarity and lack of risk factors often delay diagnosis. Case presentation: The patient was a 34-year-old pregnant Italian woman, presenting with severe osteoporosis related to pregnancy and lactation. The patient presented for the first time at the Outpatient clinic of the Rehabilitation Unit in the Department of Public Health at the University of Federico II, Naples in March 2024, exhibiting severe symptoms indicative of osteoporosis, along with acute lower back pain. During the anamnesis, it was revealed that the patient was unable to bend forward, with reduced flexion and extension movements. The symptoms began during the third trimester. Management and diagnosis: In terms of diagnosis, clinical exams were conducted to confirm the disease. The MRI exam showed fractures and vertebral variations, with significant findings including calcification. Additionally, DXA indicated lower values compared to normal Treatment included: breastfeeding cessation, correction of calcium and vitamin D deficiencies, and bisphosphonate injection therapy. It is noteworthy that the rehabilitative approach has been recommended throughout pharmacological treatment and especially upon its suspension. Ultimately, the primary cause of this condition was pregnancy as bone resorption increases during pregnancy. Outcome: Following clodronate treatment completion, the patient showed full clinical recovery and significant radiological improvement. Follow-up DXA one year after diagnosis revealed normalized bone density and the patient had gained autonomy in activities of daily living with no further symptoms. Full article

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

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Journal of Functional Morphology and Kinesiology

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