Journal of Sports Medicine and Physical Fitness最新文献

{"title":"A critical commentary on CrossFit Research® with coach insights on training monitoring and physical assessment.","authors":"Diogo V Martinho, Renato Costa, Daniel VAN DEN Hoek, Filipe M Clemente, Oliver Gonzalo-Skok, Élvio R Gouveia, Pedro Campos, Alex S Ribeiro, Adam Field, Hugo Sarmento","doi":"10.23736/S0022-4707.26.17836-0","DOIUrl":"10.23736/S0022-4707.26.17836-0","url":null,"abstract":"<p><strong>Background: </strong>CrossFit^® has experienced rapid global growth, yet scientific research often fails to reflect the realities of training and competition in this sport. Studies frequently rely on inconsistent terminology, non-specific testing protocols, and heterogeneous samples, limiting the ecological validity and practical application of findings. This critical commentary aims to evaluate the methodological challenges in CrossFit^® research and to highlight the importance of contextualizing scientific inquiry through the perspectives of coaches actively working within the sport.</p><p><strong>Methods: </strong>A targeted review of the CrossFit^® literature was conducted, with a focus on sampling descriptions, testing protocols, and training monitoring approaches. In addition, semi-structured interviews were conducted with five national and international-level CrossFit^® coaches. Analysis of coach responses was used to contextualize gaps in the literature.</p><p><strong>Results: </strong>Coaches reported relying primarily on competition results, training observations, and subjective feedback to guide programming, rather than standardized physical testing or technology-based monitoring. The remote nature of many coach-athlete relationships further complicates data collection and training analysis.</p><p><strong>Conclusions: </strong>CrossFit^® research must improve its methodological rigor by adopting sport-specific assessments, clearly defining participant characteristics, and embracing the realities of coaching practice. Integrating qualitative insights and prioritizing ecological validity will help bridge the gap between science and the sport's unique demands.</p>","PeriodicalId":17013,"journal":{"name":"Journal of Sports Medicine and Physical Fitness","volume":" ","pages":"1015-1023"},"PeriodicalIF":1.3,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148361190","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of cold-water immersion after rugby-specific training on endurance performance.","authors":"Kohei Dobashi, Takeru Hirai","doi":"10.23736/S0022-4707.26.17891-8","DOIUrl":"10.23736/S0022-4707.26.17891-8","url":null,"abstract":"<p><strong>Background: </strong>This study investigated whether whole-body cold-water immersion (CWI) following rugby-specific training influences endurance exercise performance 24 h later.</p><p><strong>Methods: </strong>Eleven healthy male collegiate rugby players completed an incremental cycling test to determine peak oxygen uptake (V̇O<inf>2peak</inf>) and time to exhaustion at baseline (Pre). One week later, participants performed a standardized rugby-specific training session consisting of warm-up, skill-based passing, contact drills, individual training (i.e., conversion kicking and scrummaging), and a bronco endurance test (total duration: 180 min), followed by one of two recovery interventions in a randomized order: 1) whole-body CWI for 8 min at 15 °C (CWI) or 2) seated rest for 8 min (Control). Participants then performed the incremental cycling test 24 h after each intervention.</p><p><strong>Results: </strong>Training load during the rugby-specific training, assessed using heart rate-based training load and blood lactate concentrations, did not differ between the trials. Time to exhaustion (485±72 vs. 518±77 s, P=0.107, d=0.45) and V̇O<inf>2peak</inf> did not differ between the Control and CWI trials, whereas the relative changes in these variables from Pre were greater in the CWI than in the Control trials (both P<0.05). Oxygen uptake, minute ventilation, and rating of perceived exertion during submaximal exercise were similar across the Pre, Control, and CWI trials.</p><p><strong>Conclusions: </strong>These results suggest that whole-body CWI following rugby-specific training may be associated with favorable changes in endurance exercise performance 24 h post-intervention compared with the control condition. However, the expectancy/placebo effect of water immersion on exercise performance could not be excluded.</p>","PeriodicalId":17013,"journal":{"name":"Journal of Sports Medicine and Physical Fitness","volume":"66 9","pages":"993-1001"},"PeriodicalIF":1.3,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148969353","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Climbing the wall to success: how parkour experience shapes athletic performance capacities.","authors":"Andoni Elizondo-Donado, Nikola Andrić, Josune Rodríguez-Negro, Javier Yanci","doi":"10.23736/S0022-4707.26.17822-0","DOIUrl":"10.23736/S0022-4707.26.17822-0","url":null,"abstract":"<p><strong>Background: </strong>Parkour is a discipline centered on adaptive whole-body movement through complex environments, yet scientific evidence on its physical performance demands remains limited.</p><p><strong>Methods: </strong>This cross-sectional observational study aimed to profile the athletic capacities of experienced traceurs, determine whether chronological age or accumulated parkour-specific experience better predicts performance, and explore associations between a parkour-specific task and general physical tests. Thirty-six male traceurs (24.1±5.2 years old; 9.6±4.4 years of experience) completed a test battery including countermovement jump with arm swing (CMJ+), standing long jump (SLJ), triple horizontal plyometric jump (3HPJ), 40 m sprint (Sp40), change-of-direction t-test, and five climb-ups for time (5CUFT). Participants were stratified by age (≤23 vs. >23 years) and experience (≤10 vs. >10 years).</p><p><strong>Results: </strong>Age was not significantly associated with performance, whereas years of experience correlated positively with SLJ (ρ=0.49, P=0.002), and 3HPJ (ρ=0.45, P=0.006), and negatively with 5CUFT time (ρ=-0.56, P<0.001). The more experienced group outperformed less experienced peers in 5CUFT (P=0.008, PS=0.21). Additionally, 5CUFT performance correlated negatively with CMJ+ (ρ=-0.43, P=0.01), SLJ (ρ=-0.64, P<0.001) and 3HPJ (ρ=-0.65, P<0.001), and positively with t-test (ρ=0.38, P=0.021). Sp40 showed a non-significant positive trend (ρ=0.32, P=0.054).</p><p><strong>Conclusions: </strong>These findings suggest that accumulated parkour practice is more strongly associated with physical performance than chronological age. The level of significance was set at P≤0.05.</p>","PeriodicalId":17013,"journal":{"name":"Journal of Sports Medicine and Physical Fitness","volume":" ","pages":"1002-1014"},"PeriodicalIF":1.3,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148663858","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The feasibility of radial shockwave therapy in enhancing recovery during an international basketball tournament.","authors":"Paul Hobrough, Harriet Hobrough, Elena Paci, Ka Y Chui, Kevin Thomas, Glyn Howatson","doi":"10.23736/S0022-4707.26.17910-9","DOIUrl":"10.23736/S0022-4707.26.17910-9","url":null,"abstract":"<p><strong>Background: </strong>Radial shockwave therapy (rSWT) is widely used for musculoskeletal conditions, but its use and efficacy in athletic recovery are relatively unexplored. Multi-day basketball tournaments result in repeated physical stress on players, leading to muscle soreness that can impair recovery. The aim of this study was to investigate the feasibility and possible efficacy of rSWT in applied sports. Specifically, to examine the feasible effectiveness of post-match rSWT in reducing muscle soreness and improving perceived recovery, fatigue, and sleep quality in master's basketball players during a tournament.</p><p><strong>Methods: </strong>Using a parallel group design, 61 male and female basketball players allocated to intervention or control, either a rSWT treatment group (N.=30) or a control condition (N.=31) during an international tournament. The participants in the rSWT group received treatment within four hours after each game to quadriceps, hamstrings, and calves of both legs. Participants in the control group received no treatment. Daily self-report questionnaires before the tournament (baseline) and on each day of competition for muscle soreness (Likert Scale), perceived recovery (PRS), fatigue (VAS-F), and quality of sleep (Consensus Sleep Diary) were completed.</p><p><strong>Results: </strong>Fifty-six participants completed the study. The rSWT group showed lower muscle soreness than controls (P<0.001), with a 35% reduction compared to control by Day 4. Perceived recovery was improved in the rSWT group compared to the control (P<0.004). No differences were found between groups for fatigue or sleep quality.</p><p><strong>Conclusions: </strong>Post-game rSWT is a feasible and effective approach to reduce muscle soreness and improve perceived recovery during fixture congestion experienced during international competition. Although fatigue and sleep were not affected and the underlying mechanisms remain to be elucidated, these observations support the potential for rSWT in a new application as a tool to facilitate exercise recovery.</p>","PeriodicalId":17013,"journal":{"name":"Journal of Sports Medicine and Physical Fitness","volume":" ","pages":"1039-1048"},"PeriodicalIF":1.3,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148217373","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Written vs. verbal sleep hygiene strategies administration in track and field athletes: a randomized controlled trial study.","authors":"Stefano Borghi, Lucia Imperiali, Jacopo Vitale, Roberto Codella, Antonio LA Torre, Elisa Tallini, Rocco Sarubbi, Sara Bizzozero","doi":"10.23736/S0022-4707.26.17762-7","DOIUrl":"10.23736/S0022-4707.26.17762-7","url":null,"abstract":"<p><strong>Background: </strong>Sleep hygiene strategies (SHS) are practical, evidence-informed recommendations to enhance both the quantity and quality of sleep in athletes. However, little is known about how these strategies could be communicated and implemented in practice. The primary objective of this study is to investigate how different methods of delivering SHS (written vs. verbal) affect sleep hygiene and sleep parameters in athletes.</p><p><strong>Methods: </strong>The study was a three-arms randomized controlled trial (ClinicalTrials.gov Identifier: NCT07083544) involving track and field athletes competing at the regional or national level (N.=66). Athletes were randomized to either a control group (CON=22), a written SHS group (W-SHS=22), or a verbal SHS group (V-SHS=22). Sleep characteristics were assessed by actigraphy and sleep diary during a ten-day baseline period (T0) and a ten-day intervention period (T1). Six objective sleep parameters and the Sleep Regularity Index were assessed. Participants also completed a training diary and the Sleep Hygiene Index (SHI).</p><p><strong>Results: </strong>No statistical differences were found between and within groups in training and sleep parameters, but SHI scores improved significantly in the intervention groups between T0 and T1, with differences compared to the control group. A non-significant improvement in total sleep time was observed in the intervention groups, primarily due to earlier bedtimes.</p><p><strong>Conclusions: </strong>While significant differences in objective sleep measures were not observed, the trends suggest that both written and verbal SHS interventions can modestly improve sleep-related behaviors, particularly by encouraging earlier bedtimes and slightly extending total sleep duration.</p>","PeriodicalId":17013,"journal":{"name":"Journal of Sports Medicine and Physical Fitness","volume":" ","pages":"1078-1086"},"PeriodicalIF":1.3,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148663852","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"From speed to watts: a physics-based model for estimating power output during professional cycling climbs.","authors":"Sebastian Sitko, Isaac López-Laval, Rafel Cirer-Sastre, Cristina Barrajón-Pérez, Alejandro Legaz-Arrese","doi":"10.23736/S0022-4707.26.18115-8","DOIUrl":"10.23736/S0022-4707.26.18115-8","url":null,"abstract":"<p><strong>Background: </strong>Accurate quantification of mechanical power output is fundamental for performance analysis in road cycling. However, access to power meter data is often limited in research and applied contexts. The aim of the present study was to develop and validate a physics-based framework to estimate power outputs in professional cycling with publicly available data.</p><p><strong>Methods: </strong>Performance data from professional cyclists who completed the uphill individual time trial to Peyragudes in the 2025 Tour de France were obtained from publicly available sources. Mean power output was estimated using a mechanical model that accounts for gravitational, aerodynamic, and rolling resistance forces, incorporating rider mass, course characteristics, velocity, and altitude-derived air density. Estimated values were compared with power meter data available from riders' publicly shared activity files.</p><p><strong>Results: </strong>The comparison across 28 professional cyclists showed a good level of agreement between estimated and measured power outputs (mean absolute error = 14.07 W; Mean absolute percentage error = 3.65%). The model exhibited a small mean bias of -5.43 W where the model slightly underestimated the reported power. Bland-Altman analysis yielded 95% limits of agreement from -36.27 to 25.41 W with 26 of 28 observations within these limits.</p><p><strong>Conclusions: </strong>These results demonstrate that cycling power during sustained climbing efforts could be approximated using simple externally observable variables. This approach may represent a useful tool for reconstructing performance when direct power meter data are unavailable in professional cycling.</p>","PeriodicalId":17013,"journal":{"name":"Journal of Sports Medicine and Physical Fitness","volume":" ","pages":"1032-1038"},"PeriodicalIF":1.3,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148663910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Injury patterns and technique-specific determinants in competitive arm wrestling: implications for performance-oriented rehabilitation.","authors":"Armenuhi Melkonyan, Tigran Petrosyan","doi":"10.23736/S0022-4707.26.18112-2","DOIUrl":"10.23736/S0022-4707.26.18112-2","url":null,"abstract":"<p><strong>Background: </strong>Arm wrestling is characterized by high torsional and compressive forces acting on the upper limb, predisposing athletes to both acute traumatic and overuse injuries. Despite increasing recognition of injury patterns, quantitative evaluation of technique-specific determinants and their relationship to injury localization remains limited. The aim of the study is to investigate the patterns and mechanisms of upper limb injuries in competitive arm wrestling and to identify technique- and experience-related determinants associated with injury occurrence.</p><p><strong>Methods: </strong>A cross-sectional observational study was conducted involving 46 competitive arm wrestling athletes. Data were collected using a structured anonymous self-reported online questionnaire without independent clinical or radiological verification, assessing recalled injury type, anatomical location, perceived injury mechanism, training experience, and healthcare utilization. Descriptive statistics were calculated, and associations between variables were examined using cross-tabulation analyses with Chi-square or Exact testing, as appropriate. Univariate logistic regression analysis was performed to evaluate the relationship between technique and injury localization.</p><p><strong>Results: </strong>Muscle and ligament injuries were the most frequent (45.6%), followed by fractures (34.8%) and dislocations (19.6%). The elbow joint was the most commonly affected region (54.3%), followed by the shoulder (23.9%) and wrist (13.0%). The hook technique was the most frequently associated with injury occurrence (52.2%) and demonstrated a statistically significant exploratory association with elbow injury occurrence based on Fisher-Freeman-Halton Exact testing (P=0.041). Exploratory univariate logistic regression suggested that the hook technique was associated with higher self-reported odds of elbow injury (OR = 2.5, 95% CI 1.1-5.8, P=0.03); however, these findings require cautious interpretation given the limited sample size and uneven subgroup distribution, which may have reduced the stability and precision of the estimated associations. Less experienced athletes were more likely to sustain fractures, whereas more experienced athletes predominantly reported soft tissue injuries based on exploratory Exact-test analysis.</p><p><strong>Conclusions: </strong>Upper limb injuries in arm wrestling are predominantly localized to the elbow and are strongly influenced by technique-specific loading patterns and training experience. The hook technique was associated with a higher self-reported occurrence of elbow injury and should be interpreted as an exploratory risk indicator rather than a clinically verified risk factor. These findings support the integration of technique optimization, neuromuscular control, and progressive load management strategies in both injury prevention and performance-oriented rehabilitation programs.</p>","PeriodicalId":17013,"journal":{"name":"Journal of Sports Medicine and Physical Fitness","volume":"66 9","pages":"1068-1077"},"PeriodicalIF":1.3,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148969348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Body composition determinants of aerobic performance in elite soccer players: a partial correlation and regression analysis.","authors":"Eduard Bezuglov, Timur Vakhidov, Omid Etemad, Goran Basaric, Esther Esteban-García, Elizaveta Kapralova, Mikhail Vinogradov","doi":"10.23736/S0022-4707.26.18067-0","DOIUrl":"https://doi.org/10.23736/S0022-4707.26.18067-0","url":null,"abstract":"<p><strong>Background: </strong>The negative impact of excess adipose tissue on aerobic capacity in endurance athletes is now considered well-established. However, there is a lack of research examining this relationship in team sport athletes.</p><p><strong>Methods: </strong>Thirty-eight soccer players (mean age 23.60±4.22 years) from a leading Russian Premier League team participated in the study. On the first day of the pre-season training camp, participants underwent skinfold measurements according to the International Society for the Advancement of Kinanthropometry standards and a treadmill test with gas analysis.</p><p><strong>Results: </strong>Correlation analysis showed moderate inverse associations between adiposity markers and VO<inf>2</inf>-derived outcomes. Higher body fat percentage was associated with lower relative VO<inf>2</inf>max and vVO<inf>2</inf>max, while the sum of eight skinfolds showed a similar direction of association. However, after FDR correction, these associations should be interpreted cautiously. In prespecified HC3-robust regression models, each 1 percentage point higher body fat was associated with -1.93 mL·kg^-1·min^-1 lower relative VO<inf>2</inf>max and -0.49 km·h^-1 lower vVO<inf>2</inf>max. Each 10 mm higher sum of eight skinfolds was associated with -1.77 mL·kg^-1·min^-1 lower relative VO<inf>2</inf>max and -0.38 km·h^-1 lower vVO<inf>2</inf>max. Model performance under leave-one-out cross-validation was limited, indicating weak individual-level predictive accuracy.</p><p><strong>Conclusions: </strong>Higher adiposity markers were directionally associated with lower relative VO<inf>2</inf>max and vVO<inf>2</inf>max in elite adult male soccer players. However, the cross-sectional design, modest sample size, high FDR-adjusted q-values, and limited cross-validated performance indicate that the findings should be interpreted as exploratory group-level associations rather than robust individual-level prediction.</p>","PeriodicalId":17013,"journal":{"name":"Journal of Sports Medicine and Physical Fitness","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2026-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148663829","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Long-term Taekwondo training enhances inspiratory muscle function and physical fitness in school-aged boys.","authors":"Min-Jeong Kang, Hak-Duk Kim, Ying-Ying Xiang, Jong-Hwa Won, Yi-Sub Kwak, Ji-Seok Kim","doi":"10.23736/S0022-4707.26.17945-6","DOIUrl":"https://doi.org/10.23736/S0022-4707.26.17945-6","url":null,"abstract":"<p><strong>Background: </strong>Childhood is a critical period for physical and respiratory development. Although Taekwondo training is known to improve physical fitness, limited evidence exists regarding the effects of training duration on respiratory muscle function and its association with physical fitness in children.</p><p><strong>Methods: </strong>Sixty-four male Taekwondo practitioners aged 8-10 years were categorized into three groups based on training experience (Gup, N.=20; 1^st Poom, N.=29; 2^nd Poom, N.=15). Body composition, basic physical fitness, isometric muscle strength, and inspiratory muscle function were assessed. Differences among groups were analyzed using one-way ANOVA. Pearson's correlation coefficients were used to investigate the relationships between respiratory function, basic physical fitness, muscular strength, and total training duration.</p><p><strong>Results: </strong>The 2^nd Poom group demonstrated significantly superior performance in basic fitness (grip strength, standing long jump, side-step, and shuttle run) compared to the Gup and/or 1^st Poom groups. Regarding respiratory function, only the 2^nd Poom group showed significantly higher S-index, peak inspiratory flow (PIF), and energy values compared to the Gup group. Furthermore, significant positive correlations between respiratory function and physical fitness variables were observed exclusively in the 2^nd Poom group. Total training duration was positively correlated with S-index, PIF, and energy across all participants.</p><p><strong>Conclusions: </strong>Longer duration of Taekwondo training in childhood is associated with enhanced basic physical fitness, greater muscle strength, and better respiratory muscle function. These findings suggest that sustained Taekwondo practice may provide sufficient stimulus to promote the co-adaptation of the respiratory and neuromuscular systems.</p>","PeriodicalId":17013,"journal":{"name":"Journal of Sports Medicine and Physical Fitness","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2026-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148663849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of maturational status on physical performance of elite youth football players.","authors":"Joey Schubert, Mikkel Wisler, Mathias Kristiansen, Mads Lerche","doi":"10.23736/S0022-4707.26.17661-0","DOIUrl":"10.23736/S0022-4707.26.17661-0","url":null,"abstract":"<p><strong>Background: </strong>The aim of this study was to investigate the influence of biological maturation on physical performance in countermovement jump (CMJ), sprint time (5, 10, 25 and 30m) and maximal sprinting speed in adolescent elite football players.</p><p><strong>Methods: </strong>One hundred twenty-one male adolescent elite football players from AaB Academy were included in the trial. In total, 515 physical tests on CMJ and sprint performance were carried out during the time of data collection (2020-2023). Maturation status was calculated as percent of predicted adult height (%PAH). Five groups, based on %PAH were formed to investigate the differences in physical performance due to biological maturation status.</p><p><strong>Results: </strong>Anthropometry as well as physical performance differed significantly (P<0.05) between all five maturation groups. The largest effect sizes were detected during the adolescent growth spurt which occurred from just before to just after peak height velocity.</p><p><strong>Conclusions: </strong>This study showed that physical performance of adolescent elite football players measured on CMJ, sprint time (5, 10, 25 and 30m) and maximal sprinting speed varies based on different time points in the biological maturation period. The players located close to peak height velocity experienced a significant increase in performance compared to players located in the remaining bands.</p>","PeriodicalId":17013,"journal":{"name":"Journal of Sports Medicine and Physical Fitness","volume":" ","pages":"891-898"},"PeriodicalIF":1.3,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147839162","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}