Search Results (209)

Background and Objectives: Water polo (WP) is a high-intensity, intermittent aquatic team sport that has been extensively investigated within sports science. While contemporary literature has examined the body composition and morphological characteristics of elite and international WP players, this study aimed to define the general body composition profile of world-class WP players and determine position-specific differences. Methods: The study involved 72 national team players from Serbia, Croatia, Greece, and Italy who participated in the Olympic Games, World Championships, or European Championships. Participants’ body composition was measured using the InBody 720 multichannel bioimpedance method. Ten different variables were examined to assess body structure regarding contractile and ballast components. Results: MANOVA revealed statistically significant differences in body composition across playing positions (Wilks’ lambda = 0.239, p < 0.000, η²_p = 0.402). The variables that had the greatest impact on the difference were: body mass, body fat and body mass index with the 47.0, 44.4, and 43.7% of explained total variance of the impact on the differences (p = 0.000), respectively. Conclusions: world-class WP players assigned to different playing positions differ significantly in body composition. These positional profiles should be considered in talent identification, selection procedures, training, and nutritional strategies to optimize performance models, considering the future evolution of the game at the highest competitive level. Coaches could use this information to initially select players for different specific positions based on anthropometric and body composition criteria. Full article

Objectives: To examine disordered eating behaviors, orthorexic tendencies, binge-eating episodes, attitudes toward exercise, perceived hormone-related symptoms and body image perception among competitive bodybuilders across different levels of competitive experience. Methods: In this cross-sectional study, 60 competitive bodybuilders (29 men, 31 women) completed an anonymous online questionnaire. The survey evaluated demographic characteristics, coaching and training management, phase-specific symptoms (such as libido, sleep, eating behaviors, and menstrual alterations), orthorexic tendencies, exercise addiction, and body-image perception. Results: Both sexes reported reduced libido, increased hunger, and sleep disturbances, along with frequent weight monitoring and common binge-eating episodes. Moreover, females frequently reported menstrual irregularities. ORTO-15 scores indicated a potential risk of orthorexia nervosa, while EAI-3 scores suggested a risk of exercise addiction in novice females and advanced males, with differences in mood regulation and guilt across sex and experience. Males showed higher perceived and ideal muscle mass, whereas females reported higher perceived body fat and a preference for leaner physiques. Conclusions: Competitive bodybuilders of both sexes exhibit post-competition binge eating, mood- and appearance-driven exercise behaviors, and pronounced body-image concerns. Screening, education on energy availability, structured post-competition support, and health-focused coaching are recommended to prevent the progression from sport-specific practices to clinical pathology. Full article

Background: This scoping review aimed to systematically identify communication strategies used during Joint Media Engagement (JME) and examine their associations with developmental outcomes and contextual factors. Methods: A systematic search of seven databases (up to April 2025) was conducted using Rayyan, following PRISMA-ScR guidelines; 26 studies met inclusion criteria and were synthesized to categorize parent communication strategies and their theoretical underpinnings. Results: Fifteen distinct communication strategies were identified and organized into four theoretical frameworks; Social Learning, Sociopragmatic, Behaviourist, and Theory of Mind along with a fifth category for technical scaffolding. Strategies aligned with Social Learning were most frequently reported and consistently associated with improvements in children’s language, cognitive, and socio-emotional outcomes. Findings also showed that JME strategies vary based on contextual factors, including parent type, geography, device type, media content, and child characteristics. Although most studies did not explicitly focus on JME, those employing mixed methods provided deeper insights. Conclusions: JME is shaped by both interaction quality and context, with Social Learning-based strategies playing a central role in supporting child development. The findings highlight the need for more rigorous, JME-focused research across diverse digital formats to strengthen the evidence-based parent coaching approaches to optimize JME practices in early childhood. Full article

Background: Family caregivers are essential partners in the outpatient care of older adults with cancer, yet the knowledge, skills, and confidence, collectively, of caregiver activation are not well characterized in Asian settings. Understanding activation can inform tailored support to sustain effective caregiving. Accordingly, this study assessed the overall activation levels among cancer caregivers in the three most common cancer diagnoses in Singapore by using the Caregiver-Patient Activation Measure (CG-PAM). Methods: A total of 103 informal caregivers of patients ≥60 years (lung, GI, or myeloma) at Singapore’s largest public cancer hospitals completed the 13-item CG-PAM, scored 0–100 and classified into four activation levels. Descriptive statistics summarized characteristics and CG-PAM responses, and logistic regression analyses assessed the degree of activation for individual demographic and other characteristics (p < 0.05). Results: Caregivers showed moderate–high activation (mean 65.9 ± 16.1) and the following levels: L1, 4.9%; L2, 23.3%; L3, 38.8%; L4, 31.1%. They strongly endorsed personal responsibility and active engagement, reporting confidence in key self-management tasks, but struggled to sustain behaviors under stress. Activation was not significantly associated with demographic factors or any other measured characteristics. Conclusions: Caregivers of older adults with cancer in Singapore included in this study showed moderate–high activation and strong self-management confidence but struggled to sustain behaviors under stress. Routine activation assessment and tailored support (education, coaching) could strengthen outpatient care. Longitudinal and interventional research, alongside follow-up interviews, is needed to identify unmet needs, existing support systems, and inform scalable, sustainable models. Full article

In this study, we propose a general mathematical modelling framework based on the characteristics of elite athletes’ movements in the touch rugby matches to investigate the dynamic relationship between physical workload and injury risk over time. Our framework extends the Cox-based model in the context of touch rugby by incorporating a time-scaling component and cluster-specific heterogeneity simultaneously. In addition, we allow for the inclusion of covariates (e.g., velocity variation) to capture their effects. We applied our model to high-frequency wearable sensor data collected from 27 elite athletes (15 men and 12 women). The empirical study results show that our model, time-scaled frailty model (TSFM), demonstrates better goodness-of-fit than traditional frailty and Andersen–Gill models. The results reveal that higher velocity variation, particularly during high-intensity phases, and longer time of continuous exposure to the workload spike state significantly increased overload risk, ultimately resulting in injury. It also highlights the importance of individual differences, even under the same exercise intensity. These insights provide coaches with an evidence-based framework for athlete monitoring, allowing for more personalized training loads, tactical deployment, and injury prevention strategies in elite touch rugby environments. Full article

Background: Global positioning system (GPS) technology is widely used to quantify external training load (ETL) in youth soccer. Despite its extensive application in training and match contexts, considerable heterogeneity is present in the selection, definition, and interpretation of GPS-derived variables, limiting comparability between studies and practical implementation by coaches. Objective: This narrative review aimed to summarize and critically evaluate the current literature on GPS-based ETL monitoring in youth soccer players, with a focus on commonly used variables, methodological considerations, and practical applications in training and match contexts. Methods: A narrative literature search was conducted using PubMed, SPORTDiscus, and Scopus databases. Peer-reviewed studies published in English between the years of 2012 and 2025 were included. Data were extracted on participant characteristics, GPS technology, monitored ETL variables, and contextual settings. Results: The 34 reviewed studies primarily reported total distance (TD; m), high-speed running distance (HSR; m), sprint distance (SD; m), distance per minute (m·min⁻¹), peak speed (km·h⁻¹), and acceleration- and deceleration-based (ACC, DEC; count) ETL variables. Substantial variability was observed in speed thresholds, acceleration definitions, and data processing methods. Positional roles, training formats (e.g., small-sided games), and seasonal phase influenced ETL demands, although methodological inconsistencies limited cross-study comparisons. Conclusion: GPS technology provides valuable insights into the ETL demands of youth soccer. The lack of standardized variable definitions and thresholds remains a major limitation. Greater methodological consistency and clearer reporting standards are required to enhance the practical usefulness of GPS monitoring for coaches in youth soccer. Full article

Animal-assisted services (AASs) are increasingly integrated into healthcare, education, and social support settings. However, empirical evidence on the emotional well-being of participating dogs remains limited. This study investigates how dog, session, handler, and client factors influence dogs’ affective states during animal-assisted activities (AAAs), education (AAE), coaching (AAC), and therapy (AAT). A total of 837 sessions involving 63 dogs and 30 handlers were observed, with behavioural scoring and statistical analyses used to analyse the data. Principal Component Analysis then identified key affective components, including playfulness, comfort, anxiety, and uncertainty, which explained 45–61% of the variance. Session circumstances, as well as the characteristics of handlers, clients, and individual dogs—including age, experience, and gender—significantly influenced dogs’ responses. Specifically, older dogs were less playful but more settled, while experience was linked to positive affect in AAAs and AAT, but not in AAC. Female dogs demonstrated increased uncertainty and arousal in AAAs and AAE. The impact of session length varied by context. In AAC, unfamiliar handlers increased tension. Additionally, younger clients were associated with heightened uncertainty or tension in dogs across AAAs, AAC, and AAE. In light of these findings, optimising dog welfare requires matching dogs to suitable roles, attentive session planning, and managing workload. Full article

Background: Wearable sensors and global positioning systems (GPS) can enable objective monitoring of training loads in outdoor endurance sports. In biathlons, comparing training characteristics across developmental stages can help identify structural gaps and support evidence-informed progression within long-term athlete development (LTAD). This study aimed to quantitatively compare the annual training characteristics of Korean male biathlon national team (NT) and university (UNV) athletes. Methods: Annual physical training data (2022–2024) from NT (n = 6) and UNV (n = 6) athletes were collected using Catapult Vector S7 GPS devices and Polar H10 heart rate monitors. Training volume, intensity distribution (zones 1–3 based on %HRmax), modality (skiing vs. running), and periodization were compared using Mann–Whitney U tests with rank-biserial correlation (r_rb). Results: NT athletes accumulated a higher annual training time and distance than UNV athletes (812 vs. 606 h; 6359 vs. 4130 km; p = 0.002, r_rb = 1.000 for both). The NT athletes spent a lower proportion of time on low-intensity training and a higher proportion on mid and high intensities than UNV athletes (p ≤ 0.015). During high-intensity training, NT athletes maintained a higher proportion of ski-specific training, whereas UNV athletes relied more on running (skiing: 78.5% vs. 46.4%; running: 21.5% vs. 53.6%; both p < 0.001, r_rb = 1.000). The UNV group also showed a more concentrated structure during competition periods than NT athletes (COMP: 28.3% vs. 14.6%; p < 0.05). The absolute annual strength training time did not differ, but UNV athletes showed a higher strength ratio (23.3% vs. 16.8%; p < 0.001, r_rb = 1.000). Conclusion: UNV athletes exhibited a lower total volume, more low-intensity-skewed distribution, and reduced ski-specific exposure during high-intensity training compared with NT athletes. These observed structural gaps can provide empirical benchmarks that may help coaches plan stage-appropriate progression, and they illustrate the practical value of GPS- and wearable-based monitoring for identifying training divergences across developmental stages. Full article

In a rapidly changing era, education systems must empower learners as community innovators through Place-Based Education (PBE). While School–University partnerships are global drivers of reform, the specific administrative mechanisms required to support and scale these innovations within decentralized policy frameworks, such as Thailand’s Education Sandbox, remain underexplored. This Research and Development (R&D) study, integrated with a Design Thinking framework, investigated school-led administrative innovations across four diverse jurisdictions in the Songkhla Education Sandbox over 12 months. The study synthesized a collaborative administrative framework structured around four core pillars: Strategic Mentoring and Thinking Partnership, Place-Based Educational Ecosystems, Adaptive Governance and Resource Autonomy, and Collective Synergy and Iterative Development. Empirical findings indicate that this framework supported the development of “Innovative Co-creator” characteristics among students, generating high-value outcomes such as “Songkhla Mini Mango Coffee” and social innovations from water hyacinth. The study concludes that educational transformation thrives when administrative structures shift from compliance-driven mandates to flexible, context-responsive partnerships. By integrating university-led coaching with community assets, the framework offers a promising, contextually adaptable model for enhancing student learning outcomes while preserving local socio-cultural identity. This systematic approach supports the continuity of educational reform across diverse regional contexts. Full article

Padel has gained considerable popularity in recent years; however, the characteristics of padel-related injuries characteristics and epidemiological estimates remain poorly defined. This scoping review aimed to describe the epidemiology, incidence, and prevalence of injuries in padel reported following PRISMA extension for scoping reviews (PRISMA-ScR) guidelines. The literature search was conducted between January and June 2025, and studies published within the last five years were eligible for inclusion. Studies were identified through PubMed, SCOPUS, and SPORTDiscus. Methodological quality was assessed using the Newcastle–Ottawa Scale (NOS) for observational and cohort studies and AMSTAR-II for systematic reviews. Fourteen studies including 3581 players were analyzed. In the upper limbs, the elbow was the most commonly injured region, followed by the shoulder, with a predominance of tendinous injuries, particularly involving the extensor carpi radialis brevis tendon. In the lower limbs, the knee and ankle were the most affected joints, with ligament injuries being the most frequent, mainly involving the anterior cruciate ligament and the posterior talofibular ligament, respectively. Padel shows a high incidence and prevalence of injuries, with limited evidence regarding treatment. This review provides a structured overview of injury patterns in padel that may inform clinicians and coaches when prioritizing prevention and conditioning strategies, while highlighting the need for prospective, standardized injury surveillance and padel-specific intervention research. Full article

Background: CrossFit is a high-intensity training modality experiencing global growth, but its injury risk profile remains debated. Existing epidemiological studies show a significant geographical bias, with a complete lack of data from North Africa, including Libya. To the best of our knowledge, this study provides the first epidemiological data on CrossFit injuries in Libya, addressing this geographical gap. This study aimed to determine the prevalence, characteristics, and associated risk factors of musculoskeletal injuries among CrossFit athletes in Tripoli, Libya. Study Design: This descriptive, cross-sectional study utilized a convenience sample of CrossFit athletes. Data were collected via a self-administered, paper-based questionnaire adapted from validated epidemiological surveys. Methods: A total of 137 male CrossFit athletes from four affiliated gyms in Tripoli were enrolled. Participants completed a self-administered questionnaire collecting sociodemographic data, training characteristics, and injury history based on a time-loss definition (missing ≥1 training day or seeking medical attention) over a 12-month recall period. Data were analyzed using descriptive statistics. Logistic regression was used to identify injury predictors. Results: The injury prevalence was 40.6%. The shoulder (33.3%) and lumbar spine (25.3%) were the most frequently injured anatomical locations. The primary mechanism of injury was sudden movement (38.6%), and the most common type of injury was tendinopathy (34.5%). The cohort was characterized by relatively young athletes with high training frequency, nearly half of whom had less than six months of training experience. Longer training duration was the only significant independent predictor of injury (OR = 0.136, 95% CI [0.034–0.543] for beginners vs. experienced athletes; p = 0.009), indicating that experienced athletes were at higher risk. Conclusions: Libyan CrossFit athletes experience high injury rates, with longer training duration—not novice status—predicting injury. These findings underscore the urgent need for standardized coaching and gym affiliation in developing fitness markets to mitigate technique-related injuries and ensure safe sport participation. Full article

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

The aim of this study was to analyze the effects of different competition formats on the plyometric performance of under-13 basketball players, considering the influence of maturational age and monitored through GPS devices. Thirty-seven under-13 male basketball players (age = 12.91 ± 0.57 years) from four southeast Spanish teams participated in two different tournaments. On the first day, the tournament was played according to the official Spanish Basketball Federation (FEB) rules for under-14 players. On the second day, the competition was held with modified rules (Modified Tournament), in which the basket height was lowered to 2.90 m and the three-point line was replaced by a rectangle located 4 m from the basket. Plyometric variables, such as number of impacts (total and in zones), number of horizontal impacts (total and in zones), number of steps, number of jumps (total and in zones) and g-force of jumps during takeoff and landing, were assessed using GPS monitoring. In addition, the moderating effect of maturational age on the intervention in each of the variables under study will be evaluated. The results showed that the modified tournament (MT) showed significant differences compared to the standard format (FEB) in playing time, steps, landings 5–8 G, and takeoffs >8 G during positional attacks, as well as in horizontal impact variables during counterattacks and effective playing time. Bayesian analysis provided moderate-to-strong evidence for several of these variables, and extreme evidence for playing time and impacts during effective time. Moreover, maturational age (%PAH) consistently moderated the intervention effects, particularly in impact loads and locomotor demands. These findings can provide useful insights for coaches and practitioners in youth basketball. Adjusting competition rules and considering maturational status may optimize player development by creating contexts that enhance plyometric performance while adapting to the physical and biological characteristics of young athletes. Full article

Group coaching for school leaders can make a positive contribution to supporting professional and school development. Little research has focused on the effect of group coaching as an integrated approach during a professional development trajectory. To maximize effectiveness, empirical research on perceived key factors is essential. A professional development trajectory for school leaders with integrated professional learning communities provided an opportunity to examine the experienced impact of coach characteristics linked to the coaching approach, coaching skills and coaching expertise on outcomes. Based on mixed-method research, we can conclude that the PLC coach matters. Depending on the didactic approach and coaching skills applied by the coach, school leaders sometimes experienced that coaching had a major impact on their ability to convert insights into concrete actions, as well as on their desire to continue working on the content of the trajectory. Both school leaders and coaches perceived that coaches with a large amount of domain expertise but little in the area of coaching were less effective than those more skilled with coaching and with less domain-specific knowledge. Nevertheless, both are important: coaches should use existing expertise in the development process, taking into account the needs and expectations of school leaders. Mediating factors that influenced the experienced effectiveness of PLC coaching were also examined. Full article

The evolution of tennis equipment is fundamentally linked to advances in materials science and engineering, which have enabled enhanced player performance through optimised racquet and string designs. This review comprehensively examines the critical role of modern composite materials, manufacturing methods, and string technologies in tennis equipment, focusing on how these elements influence mechanical performance and player experience. It first explores the contributions of matrix and reinforcing materials, particularly carbon fibre and aramid composites, to racquet stiffness, strength, and vibration damping. Next, it details advanced manufacturing techniques such as prepreg layup, autoclave curing, and hollow moulding, which enable precise control over mechanical properties and quality assurance. This paper further evaluates various string materials including natural gut, Kevlar, polyester, nylon, and emerging hybrid setups, analysing their mechanical characteristics, tension maintenance, and impact on ball response and player comfort. Special attention is given to the interaction between design choices and playing conditions, such as court surfaces and player sensitivity, underscoring the complex interplay between equipment mechanics and gameplay dynamics. Through an interdisciplinary lens, this paper synthesises current scientific knowledge and experimental findings, providing a critical foundation for optimising tennis equipment design. By integrating materials science with practical application, this paper provides a comprehensive understanding of tennis equipment design, identifying gaps in current research and offering insights to guide future innovation for manufacturers, coaches, and players. Full article