Journal of Sports Science and Medicine最新文献

{"title":"The Acute Effects of Antagonist Static Stretching on Agonist Performance.","authors":"Mohammadmahdi Bahrami, Hiwa Rahmani, Duane C Button, Andreas Konrad, David G Behm","doi":"10.52082/jssm.2025.93","DOIUrl":"10.52082/jssm.2025.93","url":null,"abstract":"<p><p>Stretching the antagonist muscle to enhance agonist performance has gained considerable attention. However, most studies have focused on one stretching duration. Hence, the aim of this study was to compare varying durations (40-, 80-, and 120-seconds) of antagonist (dorsiflexors) static stretching (SS) on agonist (plantar flexors: PF) muscle performance. In this randomized crossover study, 16 participants (six females) underwent four sessions (40-, 80-, 120-s dorsiflexors SS and control), with pre- and post-intervention measurements of slow (60⁰/s) and fast (240⁰/s) PF isokinetic, isometric peak torque, total work, stiff leg drop jump (SDJ) performance (height, reactive strength index (RSI) and peak power), and tibialis anterior and soleus electromyography (EMG). Dorsiflexors SS protocol involved 1x40-s (40-s), 2x40-s (80-s), and 3x40-s (120-s). There were no significant pre- to post-intervention changes in any parameter. A main effect for time demonstrated an overall decrease in fast (p < 0.0001, 5.9%, d = 0.24) and slow (p = 0.05, 6.6%, d = 0.24) isokinetic peak torque, total work (p = 0.02, 5.1%, d = 0.20) and all SDJ measures (SDJ height: p = 0.02, 2.7%, d = 0.15, RSI: p < 0.0001, 5.9%, d = 0.23, peak power: p = 0.002, 4.4%, d = 0.22). Soleus EMG decreased from pre- to post-SS after 120-s in both isometric (p = 0.002, 13.6%, d = 0.73) and slow isokinetic (p = 0.002, 12.3%, d = 0.91) peak torque as well as 80-s with slow isokinetic peak torque (p = 0.02, 6.6%, d = 0.75). In summary, different durations of dorsiflexors SS (40-s, 80-s, 120-s) did not significantly influence PF performance. However, deficits associated with a main effect for time suggested possible testing effects as detected with the control condition.</p>","PeriodicalId":54765,"journal":{"name":"Journal of Sports Science and Medicine","volume":"24 1","pages":"93-103"},"PeriodicalIF":2.4,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11877292/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143568998","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Children's Sprint and Jump Performance after Plyometric-Jump Training: A Systematic Review.","authors":"Han Wu, Shuai Li, JinYu Lai, Wei Bian, Rodrigo Ramirez-Campillo, Eduardo Sáez de Villarreal, Qi Zhao","doi":"10.52082/jssm.2025.52","DOIUrl":"10.52082/jssm.2025.52","url":null,"abstract":"<p><p>The effect of plyometric jump training on children's jump and sprint performance remains unclear. To explore the effects of PJT on jump and sprint performance in children and to further analyze the influence of participant characteristics and training variables. A literature search was conducted in the PubMed, Web of Science, and SPORTDiscus databases. The included studies (n = 17) involved 587 children, with study sample sizes ranging from 9 to 44 participants. Overall, PJT improved children's vertical jump performance involving squat jump and countermovement jump (ES = 0.78, 95% confidence interval [CI] = 0.41-1.16, <i>I²</i> = 63%, p < 0.01; n = 474), standing long jump performance (ES = 0.56, CI = 0.3-0.83, <i>I²</i> = 26%, p < 0.0001; n = 414), and sprint performance involving 5 m to 30 m distances (ES = -0.41, CI = -0.61 to -0.22, <i>I²</i> = 0%, p < 0.01; n = 424). Subgroup analysis showed non-tapering strategies (ES = 0.92, n = 88) resulted in significant difference than tapering strategies (ES = 0.37, n = 336 np = 0.01). Meta-regression showed a positive correlation between the total number of training sessions and standing long jump performance improvement (p = 0.03). Two studies have a high risk of bias (RoB), and 15 studies have a moderate RoB (some concerns). The GRADE assessment indicated a very low to low robustness of the evidence. In conclusion, PJT can improve children's jump and sprint performance. Increasing the number of training sessions may lead to better standing long jump results. However, the low to very-low robustness of the currently available evidence precludes recommendations regarding PJT for improving children's neuromuscular performance.</p>","PeriodicalId":54765,"journal":{"name":"Journal of Sports Science and Medicine","volume":"24 1","pages":"52-74"},"PeriodicalIF":2.4,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11877303/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143568941","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Stress and Anxiety Among Elite Volleyball Referees While Officiating.","authors":"Stefanie Klatt, Lisa-Marie Bea, Sebastian Brückner, André Jungen, Benjamin Noël, Bernd Strauss","doi":"10.52082/jssm.2025.160","DOIUrl":"10.52082/jssm.2025.160","url":null,"abstract":"<p><p>Effective decision making and communication are essential skills for sports officials, who frequently report experiencing considerable stress across various sports. This study evaluated the impact of a stress management program on elite volleyball referees. The intervention aimed to reduce stress and anxiety while enhancing coping strategies. Thirty-eight referees (24 males, 14 females) participated in a randomized intervention guided by two experienced applied sport psychologists. Stress and physiological measures were assessed before and after officiating. Anxiety and officiating-related stress were evaluated using the State-Trait-Anxiety Inventory (STAI) and an adapted version of the Basketball Officials Source of Stress Survey (BOSSS-d), respectively. Cardiac responses, including heart rate (HR) and heart rate variability (HRV), were monitored during games. The program's effectiveness was assessed using the Inventory of Quality Sport Psychological Support (QS17). Although the pre- and post-intervention comparisons did not reveal significant changes in anxiety, reported sources of officiating-related stress, or cardiac responses, findings from the QS17 indicated potential benefits of the stress management program for elite volleyball referees, highlighting avenues for sport psychological support and interventions. Future research, particularly longitudinal studies, is needed to further explore referees' stress experiences during officiating.</p>","PeriodicalId":54765,"journal":{"name":"Journal of Sports Science and Medicine","volume":"24 1","pages":"160-171"},"PeriodicalIF":2.4,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11877293/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143568994","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Effects of High-Intensity Interval Training on Basketball Players: A Systematic Review and Meta-Analysis.","authors":"Shudian Cao, Zhenxing Li, Zhaoran Wang, Soh Kim Geok, Jia Liu","doi":"10.52082/jssm.2025.31","DOIUrl":"10.52082/jssm.2025.31","url":null,"abstract":"<p><p>This review aims to evaluate the effectiveness of HIIT on basketball players' physical fitness and skill-related performance. This study adhered to the PRISMA guidelines and included randomized controlled trials (RCTs) that investigated the effects of HIIT on basketball players. The databases searched included Web of Science, Scopus, PubMed, and SPORTDiscus (up to 4 March 2024). The meta-analysis used a random-effects model, with effect sizes (ES) calculated for various performance outcomes. A total of 15 studies, with a low risk of bias or some concerns of bias, including 369 players (130 females, 239 males) at the developmental level, national level, and international level, were included in the systematic review, with 7 of these included in the meta-analysis. The systematic review indicated that HIIT significantly improved cardiovascular endurance, power, change of direction (COD) ability, linear sprint, and basketball skill-related performance. However, the effects on certain physical aspects such as VO_2max, the Yo-Yo intermittent recovery test level 1 (Yo-Yo IR 1), jump tests, ball throw test, 20-m COD sprint test, T-test, 20-m linear sprint, and basketball-specific skills such as shooting accuracy and passing were inconsistent. The meta-analysis revealed a very large effect on the Yo-Yo IR 1 (ES = 2.32; p = 0.000), a moderate effect on VO_2max (ES = 0.90; p = 0.000), T-test performance (ES = 0.91; p = 0.000), and CMJ height (ES = 0.76; p = 0.000), and a small effect on the 20-m sprint test (ES = 0.59; p = 0.006). HIIT appears to be an effective training method for improving general physical fitness and certain basketball-specific skills, particularly endurance, power, and agility. However, its impact on more skill-specific aspects, such as shooting accuracy and passing, requires further investigation. Coaches should consider supplementing HIIT with targeted skill training and carefully plan its timing, ideally incorporating HIIT during pre-season or off-season periods for optimal effectiveness. Further research is needed to explore the differential effects of HIIT across various age groups and playing levels.</p>","PeriodicalId":54765,"journal":{"name":"Journal of Sports Science and Medicine","volume":"24 1","pages":"31-51"},"PeriodicalIF":2.4,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11877297/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143568369","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Accentuated Eccentric Loading in Countermovement Jumps Vs. Drop Jumps: Effects on Jump Performance and Strength in A Randomized Controlled Trial.","authors":"Zhengqiu Gu, Chong Gao, Hang Zheng, Kaifang Liao, Chris Bishop, Jonathan Hughes, Mingyue Yin, Zhiyuan Bi, Zhan Li, Jian Li, Meixia Chen, Jianxi Wei, Yongming Li","doi":"10.52082/jssm.2025.20","DOIUrl":"10.52082/jssm.2025.20","url":null,"abstract":"<p><p>This study examined the effects of Accentuated Eccentric Loading Countermovement Jump (AEL CMJ) training on jump performance, lower body strength, sprint performance, and change of direction ability, compared to drop jump (DJ) training. This study used a randomized controlled trial (RCT) with a parallel design. Forty men physical education students (Mean ± SD: age 22.60 ± 3.24 years, body mass 75.21 ± 8.12 kg, height 1.79 ± 0.07 m) were randomly assigned to AEL (n = 14), DJ (n = 13), or a control group (CON, n = 13). The AEL and DJ groups trained three times per week for 8 weeks, while the CON group maintained their usual routines. All groups with similar levels of physical activity outside the training. Pre-, mid- (4 weeks), and post-intervention (8 weeks) assessments measured jump performance (CMJ and squat jump (SJ)), 1RM squat strength, 30 m sprint time, and change of direction (T-test). A mixed-effects model evaluated group and time effects. Significant group × time interactions were observed for CMJ height (P = 0.006), with both AEL and DJ training improving CMJ (AEL: +11.8%, ES = 0.77; DJ: +7.7%, ES = 0.47), SJ height (AEL: +5.7%, ES = 0.37; DJ: +11.3%, ES = 0.66), and 1RM squat (AEL: +7.0%, ES = 0.44; DJ: +8.4%, ES = 0.46) at 8 weeks. Neither training method significantly improved sprint or change of direction performance. Additionally, no significant gains were seen in any indicator at 4 weeks. These results indicate that AEL CMJ and DJ training both effectively enhance vertical jump and strength, positioning AEL CMJ as an effective alternative or complement to DJ training.</p>","PeriodicalId":54765,"journal":{"name":"Journal of Sports Science and Medicine","volume":"24 1","pages":"20-30"},"PeriodicalIF":2.4,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11877295/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143568930","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of Acute Upper and Lower Body Resistance Exercise on Cardiovascular Response in Adult Women Through Blood Flow Restriction.","authors":"Choung-Hwa Park","doi":"10.52082/jssm.2025.187","DOIUrl":"10.52082/jssm.2025.187","url":null,"abstract":"<p><p>The purpose of this study was to compare and contrast cardiovascular responses during acute upper body resistance exercise (UBRE) and lower body resistance exercise (LBRE) and resting with or without blood flow restriction (BFR) in adult women. The subjects were 18 adult women (21.5 ± 2.0 years old) and it was a cross-over experimental design. Resistance exercise consisted of 20% 1-RM, 10 repetitions, and 4 sets. For UBRE, arm curl and bench press exercise, and LBRE squat and leg extension exercise were performed. The change in cardiovascular response during exercise and recovery with or without BFR was significantly different between UBRE (diastolic blood pressure: DBP, mean arterial pressure: MAP, total peripheral resistance: TPR) and LBRE (DBP, MAP, heart rate: HR, Cardiac output: CO) (<i>p</i> < .05). In non-BFR, DBP, MAP, SV, HR, CO, there was a difference in TPR (<i>p</i> < .05). It was concluded LBRE with BFR had a positive effect on the cardiovascular response of the cardiovascular system during exercise and recovery.</p>","PeriodicalId":54765,"journal":{"name":"Journal of Sports Science and Medicine","volume":"24 1","pages":"187-194"},"PeriodicalIF":2.4,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11877287/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143568965","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparing The Effectiveness of 10-Minute Dynamic Stretching, Vibration Rolling, and Climbing-Specific Warm-Ups on Exercise Performances in Rock Climbers.","authors":"Hsueh-Ping Han, Pei-Shan Yang, Chia-Lun Lee, Nai-Jen Chang","doi":"10.52082/jssm.2025.84","DOIUrl":"10.52082/jssm.2025.84","url":null,"abstract":"<p><p>The rise of sport climbing as a popular Olympic sport has underscored the need for optimal warm-up regimes, especially for rock climbers. This randomized, counterbalanced crossover study investigated the effects of dynamic stretching warm-up (DW) with Thera-Band, vibration rolling warm-up (VR), and climbing-specific warm-up (CW) on the flexibility, muscle strength, and dynamic stability of upper limbs in 22 recreational rock climbers without musculoskeletal diseases. Participants underwent each warm-up method in a randomized order. Each warm-up session lasted 10 minutes. Flexibility was measured with a goniometer, muscle strength was measured with a hand-held dynamometer, and dynamic stability was measured with an Upper Quarter Y-balance test. The findings revealed that all three warm-up methods significantly enhanced range of motion (ROM) of shoulder flexion, internal rotation, external rotation, overhead flexibility, and dynamic stability (p < 0.05). Moreover, VR was notably more effective than DW and CW in augmenting shoulder flexion flexibility and external rotation. All warm-ups increased the maximal muscle strength of the elbow flexors and shoulder extensors, but did not in finger flexors. CW demonstrated superior change improvements in the maximal muscle strength of the shoulder external rotators compared to DW (p = 0.04). This study highlights our design, recommending all three warm-ups to enhance flexibility, muscle strength, and dynamic stability of the upper limbs. Specifically, VR is the most effective for improving flexibility, while CW provides superior gains in shoulder external rotator strength. These insights can help climbers and coaches develop targeted warm-up strategies to optimize performance.</p>","PeriodicalId":54765,"journal":{"name":"Journal of Sports Science and Medicine","volume":"24 1","pages":"84-92"},"PeriodicalIF":2.4,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11877290/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143568890","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Reliability of Dynamic Balance Test with A Mobile Application of Physics Toolbox Suite.","authors":"Erdem Atalay, Ebru Turan Kızıldoğan","doi":"10.52082/jssm.2025.154","DOIUrl":"10.52082/jssm.2025.154","url":null,"abstract":"<p><p>Although mobile applications are used as an alternative to expensive and difficult to access systems used to evaluate dynamic balance, existing applications have some shortcomings. This study aimed to evaluate the reliability of the Physics Toolbox Suite mobile application, which can obtain objective data for dynamic balance measurements in healthy adults, shorten the duration of measurements, and minimize the number of measurement equipment. The dynamic balance of 22 university students (9 male, 13 female, aged 20.3 (± 1.13 years)) was evaluated using the Physics Toolbox Suite mobile application in three test sessions with a 1-week interval. Anterior-posterior stability index (APSI), medial-lateral stability index (MLS), and overall stability index (OSI) of dynamic balance were calculated. Interclass Correlation Coefficients (ICC), Minimal Detectable Change (MDC), Standard Error of Measurement (SEM), and Coefficient of Variation for SEM (CV_SEM) were evaluated as indicators of intra- and inter-rater reliability. The mean APSI, MLSI, and OSI scores (Standard deviation) were 2.59 (0.69), 2.21 (0.68), and 3.58 (0.94), respectively. In the evaluation made with the Physics Toolbox Suite mobile application, APSI scores had good intra-rater (ICC(3,1) = 0.67) and inter-rater reliability (ICC(3,1) = 0.73), MLSI scores had high intra-rater (ICC(3,1) = 0.90) with good inter-rater reliability (ICC(3,1) = 0.71), and OSI scores had high intra- rater (ICC(3,1) = 0.87) with good inter-rater reliability (ICC(3,1) = 0.73). The Physics Toolbox Suite Mobile Application can be used as a reliable objective tool to assess dynamic balance among healthcare professionals and athletes.</p>","PeriodicalId":54765,"journal":{"name":"Journal of Sports Science and Medicine","volume":"24 1","pages":"154-159"},"PeriodicalIF":2.4,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11877298/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143568973","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparing The Effects of Small-Sided and Medium-Sided Soccer Games on Physical Fitness Adaptations in Untrained Men: A Randomized Controlled Study.","authors":"Xinjie Han, Lu Li, Jiawei Chen, Weiqiang Xu, Robert Trybulski, Filipe Manuel Clemente","doi":"10.52082/jssm.2025.142","DOIUrl":"10.52082/jssm.2025.142","url":null,"abstract":"<p><p>Smaller formats of sided games (SSG), such as 1v1 to 4v4, are often reported to be more physically and physiologically demanding than medium-sided games (e.g., 6v6 to 8v8). However, there is a lack of experimental research examining the effects of such stimuli on physical fitness adaptations in untrained men. This study aimed to compare the effects of small-sided games (SSG) and medium-sided games (MSG) on various physical fitness parameters (e.g., outcome 1; outcome 2) in untrained men after an 8-week intervention period. A randomized controlled design was used, comparing two experimental groups with a control group that maintained a sedentary lifestyle, which was confirmed through questionnaires. Sixty men (mean age: 18.8 ± 0.74 years) volunteered for the study. The experimental groups underwent a training intervention three times per week for eight weeks. Participants in the SSG group played games ranging from 1v1 to 3v3, while those in the MSG group engaged in games from 6v6 to 8v8. Before and after the intervention, all participants completed a series of fitness assessments, including the standing long jump (SLJ), vertical jump (VJ), 10- and 30-meter sprints, change of direction (COD), and a 20-meter multi-stage fitness test (MFT). Results revealed that after eight weeks, the SSG group demonstrated significant improvements over the control group in SLJ (p < 0.01; ES = 0.642), VJ (p < 0.01; ES = 0.511), 10-meter sprint (p < 0.01; ES = 0.62), 30-meter sprint (p < 0.01; ES = 0.41), COD (p < 0.01; ES = 0.435), and 20-meter MFT (p < 0.01; ES = 0.64). Similarly, the MSG group showed significant gains compared to the control group in SLJ (p < 0.01; ES = 0.541), VJ (p < 0.01; ES = 0.439), 10-meter sprint (p < 0.01; ES = 0.451), 30-meter sprint (p < 0.01; ES = 0.25), COD (p < 0.01; ES = 0.523), and 20-meter MFT (p < 0.01; ES = 0.693). In conclusion, this study shows that both SSG and MSG are equally effective in enhancing physical fitness parameters in untrained men, despite slight variations in intensity.</p>","PeriodicalId":54765,"journal":{"name":"Journal of Sports Science and Medicine","volume":"24 1","pages":"142-153"},"PeriodicalIF":2.4,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11877296/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143568898","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of Fatiguing Exercises on Movement Strategies in Chronic Ankle Instability, Lateral Ankle Sprain Copers, and Controls.","authors":"Hyung Gyu Jeon, Inje Lee, Hyunsoo Kim, Heeseong Jeong, Sunghe Ha, Byong Hun Kim, Sae Yong Lee","doi":"10.52082/jssm.2025.116","DOIUrl":"10.52082/jssm.2025.116","url":null,"abstract":"<p><p>While research exists to induce fatigue using isokinetic dynamometers or simple repetition tasks in patients with chronic ankle instability (CAI), there is a lack of research examining landing movement strategies using fatigue protocols that mimic actual sports. Therefore, we aimed to investigate the effects of CAI and fatiguing exercises on the lower-extremity kinematics and kinetics during single-leg drop landings among patients with CAI, lateral ankle sprain (LAS) copers and controls. A cross-sectional study recruited 20 patients with CAI, 20 LAS copers, and 20 controls in a biomechanics laboratory. All participants performed single-leg drop landings before and after the fatiguing exercises. The fatiguing exercise protocol consisted of a cycle including forward, side, and backward running, L-shape running, side hopping, cone jumps, and tuck jumps. This cycle was repeated until rate of perceived exertion (RPE) reached 17 and heart rate (HR) reached 85% of the maximum. Three-dimensional kinematics and kinetics of the lower extremity were collected and analyzed using functional analysis of variance. All participants reached an RPE level of 17.89 ± 1.02 and HR of 180.64 ± 7.87 (maximal HR 96.11%) at the last cycle of the fatigue protocol. Several group-by-fatigue interactions were noted. Patients with CAI exhibited increased hip external rotation angle and moment, increased angle and decreased moment of knee valgus, and increased hip and knee extension moments after the fatiguing exercise compared with copers and/or controls. Under fatigue conditions, patients with CAI exhibited biomechanical changes in the proximal joint, a stiffer landing position, and biomechanics associated with ankle injuries. Fatigue resistance training should be a key focus during the rehabilitation of these patients to improve their lower-extremity stability.</p>","PeriodicalId":54765,"journal":{"name":"Journal of Sports Science and Medicine","volume":"24 1","pages":"116-127"},"PeriodicalIF":2.4,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11877301/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143568969","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}