Journal of science and medicine in sport最新文献

{"title":"Exercise and Sports Science Australia updated position statement on exercise for preventing falls in older people living in the community","authors":"Anne Tiedemann ,&nbsp;Daina L. Sturnieks ,&nbsp;Elissa Burton ,&nbsp;Jeannette M. Thom ,&nbsp;Stephen R. Lord ,&nbsp;Stacey Scott ,&nbsp;Catherine Sherrington","doi":"10.1016/j.jsams.2024.09.003","DOIUrl":"10.1016/j.jsams.2024.09.003","url":null,"abstract":"<div><h3>Backgrounds</h3><div>Falls affect a significant number of older Australians and present a major challenge to health care providers and health systems with over 380 older Australians hospitalised for a fall each day.</div></div><div><h3>Objectives</h3><div>This statement seeks to inform and guide exercise practitioners and health professionals in safe and effective prescription of exercise to prevent falls amongst community-dwelling older people.</div></div><div><h3>Exercise prescription to prevent falls</h3><div>Exercise is crucial for preventing falls in older age. Research evidence has identified that programmes which include functional balance and muscle strength training are the most effective in preventing falls. It is also important for exercise to be progressively challenging, ongoing and of sufficient dose to maximise its benefits in reducing falls. Additional (non-exercise) interventions are necessary for people with complex medical conditions, recent hospitalisation and/or particular risk factors not improved by exercise. People at a higher risk of falls may need greater support to undertake safe and effective fall prevention exercise.</div></div><div><h3>Summary</h3><div>Global guidelines for fall prevention and management recommend that all older adults should receive advice about exercise to prevent falls. Qualified exercise professionals are well placed to prescribe and supervise functional balance and muscle strength training to older people with varied functional abilities, including those with co-morbidities.</div></div>","PeriodicalId":16992,"journal":{"name":"Journal of science and medicine in sport","volume":"28 2","pages":"Pages 87-94"},"PeriodicalIF":3.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142348964","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":"Exploring pregnancy and postpartum experiences among geographically diverse elite athletes: A qualitative study","authors":"Brooke McGregor,&nbsp;Richard McGrath,&nbsp;Janette Young,&nbsp;Carmel Nottle","doi":"10.1016/j.jsams.2024.10.001","DOIUrl":"10.1016/j.jsams.2024.10.001","url":null,"abstract":"<div><h3>Objectives</h3><div>Female athletes who experience childbirth during their athletic careers can expect to return to elite sports postpartum and perform at a comparable or improved level. However, mothering athletes often encounter significant barriers when re-entering elite sports. The aim of this study was to explore the experiences of a geographically diverse group of mothering athletes who returned to elite sports after childbirth.</div></div><div><h3>Design</h3><div>Qualitative phenomenological research design using semi-structured interviews.</div></div><div><h3>Methods</h3><div>In-depth one-on-one interviews were conducted with nineteen mothering elite running athletes hailing from fourteen different countries. Interviews were recorded, transcribed verbatim, and analyzed using thematic analysis.</div></div><div><h3>Results</h3><div>Findings were generated into five main themes: (1) Deciding to become a mother, (2) revealing pregnancy to stakeholders, (3) experience of pregnancy, (4) combining motherhood and elite running, and (5) improvement strategies to support athlete mothers. The findings revealed that participants experienced stress regarding their pregnancy announcements due to concerns about potential repercussions on their careers. These concerns included the impact on sponsorship deals, relationships with governing bodies, and interactions with their coaches. Participants felt their elite coaches and health practitioners had insufficient education to support them throughout their pregnancies and postpartum return to elite running. Finally, athletes express a sense of diminished pressure and increased motivation in races upon resuming their elite careers, attributing their improved athletic performance postpartum to their shift in focus from themselves to their child.</div></div><div><h3>Conclusions</h3><div>This study illuminates challenges and offers valuable insights to coaches, sponsors, health practitioners, exercise professionals, researchers, race organizers, and governing athletic bodies in better supporting mothering athletes.</div></div>","PeriodicalId":16992,"journal":{"name":"Journal of science and medicine in sport","volume":"28 2","pages":"Pages 101-109"},"PeriodicalIF":3.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142468373","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":"Investigation of exertional dyspnoea by cardiopulmonary exercise testing with continuous laryngoscopy","authors":"Melanie Wong ,&nbsp;Logan Gardner ,&nbsp;Eve Denton ,&nbsp;Brigitte M. Borg ,&nbsp;Mahesh Dharmakumara ,&nbsp;Janine Mahoney ,&nbsp;Janet Bondarenko ,&nbsp;Fiona Hore-Lacy ,&nbsp;Tiffany Lin ,&nbsp;Asger Sverrild ,&nbsp;Mark Hew ,&nbsp;Joy Lee","doi":"10.1016/j.jsams.2024.09.006","DOIUrl":"10.1016/j.jsams.2024.09.006","url":null,"abstract":"<div><h3>Objectives</h3><div>Abnormal breathlessness at maximal exercise may be caused by a range of conditions, including exercise-induced bronchospasm, breathing pattern disorder, or exercise-induced laryngeal obstruction. These three disorders may not be detected on standard cardiopulmonary exercise testing. The aim of this study was to describe diagnostic outcomes of an expanded protocol during cardiopulmonary exercise testing.</div></div><div><h3>Design</h3><div>Retrospective cohort study.</div></div><div><h3>Methods</h3><div>Patients presenting with abnormal breathlessness on maximal exercise underwent continuous laryngoscopy with cardiopulmonary exercise testing on a stationary cycle ergometer. Breathing pattern disorder was evaluated by video and ventilatory data. Pre- and post-exercise spirometry was performed.</div></div><div><h3>Results</h3><div>24 adult patients were evaluated; 10 were professional athletes. Mean age was 40 years (range 18–73). Nine of 24 (38 %) were diagnosed with exercise-induced laryngeal obstruction and referred for speech pathology. Six of these had supraglottic exercise-induced laryngeal obstruction; all were aged &lt;<!--> <!-->30 years; 5/6 were professional athletes. One patient had breathing pattern disorder and was referred for physiotherapy; one had exercise-induced bronchospasm, requiring escalation of asthma medication; one had muscle tension dysphonia resulting in referral to an otolaryngologist who administered a laryngeal injection of botulinum toxin. A further four patients had unexplained lower maximal oxygen consumption with cardiac limitation and were referred for further cardiac investigation.</div></div><div><h3>Conclusions</h3><div>In patients reporting abnormal breathlessness at maximal exercise, this expanded exercise protocol provided diagnostic information in 66.7 % cases which contributed to further personalised management.</div></div>","PeriodicalId":16992,"journal":{"name":"Journal of science and medicine in sport","volume":"28 2","pages":"Pages 95-100"},"PeriodicalIF":3.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142468374","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of low energy availability on performance in male athletes: A scoping review","authors":"Tim Hänisch ,&nbsp;Andreas M. Nieß ,&nbsp;Anja Carlsohn","doi":"10.1016/j.jsams.2024.10.008","DOIUrl":"10.1016/j.jsams.2024.10.008","url":null,"abstract":"<div><h3>Objectives</h3><div>The primary aim of this study was to investigate the effects of low energy availability on different performance outcomes in male athletes. Secondary aims were to examine an assumed dose–response relationship and identify knowledge gaps.</div></div><div><h3>Design</h3><div>Scoping review.</div></div><div><h3>Methods</h3><div>The electronic database PubMed was searched until the end of June 2023. Additionally, we used reference tracking and hand-searching for related articles. Six studies with a total of 103 male athletes met the inclusion criteria.</div></div><div><h3>Results</h3><div>Four of the included studies had an interventional study design, including one case study, and the remaining two were cross-sectional studies. Different performance outcomes (i.e., strength, endurance, speed) were either positively, negatively, or unaffected by low energy availability. The length and magnitude of the low energy availability, as well as the baseline status of the athletes could have influenced the results. Additionally, there are methodological considerations that might limit the validity of the results.</div></div><div><h3>Conclusions</h3><div>Current evidence shows heterogeneous results, as some studies suggested improvements in certain performance parameters, whilst other studies showed neutral or detrimental effects of low energy availability. Due to the limitations mentioned; additional research is warranted for a more comprehensive understanding.</div></div>","PeriodicalId":16992,"journal":{"name":"Journal of science and medicine in sport","volume":"28 2","pages":"Pages 110-117"},"PeriodicalIF":3.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142639298","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":"Increase of circulating cell free mitochondrial DNA in amateur boxers after sparring matches.","authors":"Valentina Selleri, Mara Malerba, Roberta D'Alisera, Chiara Seidenari, Giorgia Sinigaglia, Giada Zanini, Giulia Micheloni, Gustavo Savino, Anna Vittoria Mattioli, Giulia Curia, Rosina Critelli, Marcello Pinti, Milena Nasi","doi":"10.1016/j.jsams.2025.01.011","DOIUrl":"https://doi.org/10.1016/j.jsams.2025.01.011","url":null,"abstract":"<p><strong>Objectives: </strong>To determine if circulating mitochondrial deoxyribonucleic acid levels increase after sport activity involving blows to the head, such as boxing, and if it could play a role in inflammatory cascade regulation in response to trauma.</p><p><strong>Design: </strong>Observational, longitudinal.</p><p><strong>Methods: </strong>We measured mitochondrial deoxyribonucleic acid levels and integrity in ten non-professional male boxers before and after three weekly sparring matches. We set up a protocol to separate three different plasma fractions enriched in mitochondria-containing vesicles, mitochondrial deoxyribonucleic acid bound to proteins and naked mitochondrial deoxyribonucleic acid. We quantified the levels of the main cytokines involved in inflammatory response and the levels of neurofilament light, a well-known marker of brain damage.</p><p><strong>Results: </strong>Circulating mitochondrial deoxyribonucleic acid levels increased after each match. In the second fraction, we also observed an increase over the weeks. Mitochondrial deoxyribonucleic acid is less intact after each match if compared with pre-match integrity, especially the naked form which is not protected within vesicles or mitochondria. Circulating levels of interleukin-6, interleukin-1beta and interleukin-10 increased after each match linking traumatic brain injuries to inflammatory state. Neurofilament light chain showed a similar trend to mitochondrial deoxyribonucleic acid.</p><p><strong>Conclusions: </strong>As mitochondrial deoxyribonucleic acid displays an inflammatory effect and neurofilament light chain is more specific for brain injury, we concluded that the simultaneous analysis of these two parameters could be helpful to monitor the effects of traumatic brain injury in contact sports, and that mitochondrial deoxyribonucleic acid is a promising candidate biomarker to study the inflammatory state of patients who suffered repeated traumatic brain injuries.</p>","PeriodicalId":16992,"journal":{"name":"Journal of science and medicine in sport","volume":" ","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143399378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Passive hamstring muscles rigidity throughout the menstrual cycle and the effect of oral contraception.","authors":"Jérémie Bouvier, Mélanie Prudent, Emeric Stauffer, Maxime Pingon, Alexandre Fouré, Cyril Martin","doi":"10.1016/j.jsams.2025.01.008","DOIUrl":"https://doi.org/10.1016/j.jsams.2025.01.008","url":null,"abstract":"<p><strong>Objectives: </strong>Female athletes have a lower risk of hamstring strain injuries than males. The variations in oestradiol and progesterone concentrations happening during the menstrual cycle and oral contraceptive use may influence muscle mechanical properties, potentially affecting muscle injury risk. However, to date, no study has combined an assessment of hamstring muscles' mechanical properties spread over the full knee range of motion with rigorous hormonal control of the menstrual cycle, electromyographic monitoring and inclusion of oral contraceptive users. The present study aims to be the first to rigorously evaluate the association between menstrual cycle, oral contraceptive use and hamstring muscles' mechanical properties.</p><p><strong>Design: </strong>Cross-sectional study with repeated measures.</p><p><strong>Methods: </strong>Shear wave elastography measurements were performed at three different times during the menstrual and oral contraceptive cycle. Hormonal assessment and electromyographic monitoring were also carried out.</p><p><strong>Results: </strong>No difference in hamstring muscles' shear wave speed, anatomical cross-sectional area, knee joint musculoarticular stiffness and maximal range of motion were observed along the menstrual cycle despite the presence of the expected variations in ovarian steroid hormones concentrations. No difference in these parameters was also reported throughout the oral contraception use.</p><p><strong>Conclusions: </strong>No differences in the mechanical properties of the hamstring muscles were observed, whether the concentrations of ovarian steroid hormones fluctuate with the menstrual cycle or remain stable with oral contraceptive use, despite the notable effects of these hormones on the muscle composition.</p>","PeriodicalId":16992,"journal":{"name":"Journal of science and medicine in sport","volume":" ","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143364473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Does body composition relate to active drag during arms-only front crawl swimming in male collegiate swimmers?","authors":"Kenzo Narita, Sohei Washino, Tomoya Kadi, Hiroaki Kanehisa, Hirotoshi Mankyu, Eiji Fujita","doi":"10.1016/j.jsams.2025.01.009","DOIUrl":"https://doi.org/10.1016/j.jsams.2025.01.009","url":null,"abstract":"<p><strong>Objectives: </strong>Fat tissue does not directly contribute to an increase in propulsive force in swimming, though it has the potential to indirectly enhance swimming performance by reducing active drag as the specific gravity of fat tissue is lower than that of water. However, the relationship between body composition and active drag has not been elucidated. This study aimed to evaluate how body composition relates to active drag during arms-only front crawl swimming.</p><p><strong>Design: </strong>Cross-sectional study.</p><p><strong>Methods: </strong>Twenty-two male collegiate swimmers (height, 1.73 ± 0.06 m; body mass, 67.6 ± 6.0 kg) performed arms-only front crawl swimming using a measuring active drag-system. Active drag was evaluated at 1.20, 1.50 m/s, and maximum swimming velocity. Body composition data, fat mass, fat-free mass, and the percentage of fat mass relative to body mass (%fat mass) were measured using dual-energy X-ray absorptiometry. The associations between body composition data and active drag were evaluated using Pearson's correlation coefficients.</p><p><strong>Results: </strong>The results indicated that %fat mass was negatively correlated with active drag at 1.20 and 1.50 m/s, whereas fat-free mass was positively correlated with active drag at 1.50 m/s.</p><p><strong>Conclusions: </strong>In male swimmers with %fat mass between 6.3 and 12.0 %, a higher %FM, reflecting lower body density, had lower active drag at submaximal swimming velocities. These findings suggest that swimmers and their coaches should consider the balance of fat mass and fat-free mass from the perspective of active drag rather than unnecessarily decreasing fat mass or increasing fat-free mass to enhance swimming performance.</p>","PeriodicalId":16992,"journal":{"name":"Journal of science and medicine in sport","volume":" ","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143408371","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Is there a relationship between rapid weight changes and self-reported injury in combat sports athletes? A 14-month study of 24 combat sports events.","authors":"Colin S Doherty, Oliver R Barley, Lauren V Fortington","doi":"10.1016/j.jsams.2025.01.007","DOIUrl":"https://doi.org/10.1016/j.jsams.2025.01.007","url":null,"abstract":"<p><strong>Objectives: </strong>To explore the potential association between rapid weight changes and self-reported injury status (presence or absence of injury) 7 days following competitive events among male and female combat sports competitors.</p><p><strong>Design: </strong>A 14-month study of 24 events.</p><p><strong>Methods: </strong>A weight management questionnaire was completed 1-day post-competition, and an injury questionnaire was completed 7 days post-competition. These online questionnaires provided data on body mass and injury status. Mixed effects logistic regression models were used to analyse the odds ratios of rapid weight change variables and their impact on athletes' self-reporting as injured or non-injured.</p><p><strong>Results: </strong>There were 172 responses (155 athletes) to both questionnaires (37 females (24 %) and 118 males (76 %)); 88 athletes (51 %) reported no injury, and 84 (49 %) reported injury. Rapid weight loss 7 days (RWL -7 days) and 24 h (RWL -24 h) before weigh-ins was 4.9 % ± 3.4 % and 2.6 % ± 2.1 % for females, and 6.1 % ± 3.2 % and 3.0 % ± 1.9 % for males. Mixed effects logistic regression models returned the highest odds ratio for male RWL -24 h (odds ratio: 1.20, 95 % confidence interval: 1.00-1.43, p = 0.044). This indicates that for a 1 % increase in male RWL -24 h before official weigh-ins, the likelihood of reporting an injury increases by a factor of 1.2.</p><p><strong>Conclusions: </strong>Male RWL -24 h before weigh-ins is associated with reporting an injury at 7 days post-competition. Therefore, athletes and coaches should carefully consider and aim to limit pre-competition rapid weight loss to minimise the likelihood of injury.</p>","PeriodicalId":16992,"journal":{"name":"Journal of science and medicine in sport","volume":" ","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143074755","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimal dose and type of exercise to improve motor symptoms in adults with Parkinson's disease: A network meta-analysis.","authors":"Junyu Wang, Yuan Yuan, Ting Xie, Ligong Zhang, Hong Xu, Shu-Cheng Lin, Yong Yang, Dong Zhu, Jie Zhuang","doi":"10.1016/j.jsams.2025.01.003","DOIUrl":"https://doi.org/10.1016/j.jsams.2025.01.003","url":null,"abstract":"<p><strong>Objectives: </strong>This study aimed to evaluate the dose-response relationship between different exercise types and the alleviation of motor symptoms in Parkinson's Disease patients.</p><p><strong>Design: </strong>A systematic review and network meta-analysis were conducted to compare the effects of 12 exercise types on motor symptoms in Parkinson's Disease patients using randomized controlled trials.</p><p><strong>Methods: </strong>A systematic search was conducted across PubMed, Medline, Embase, PsycINFO, Cochrane Library, and Web of Science until September 10, 2024. A total of 81 trials involving 4596 patients were included. Mean differences with 95 % credible intervals were calculated, and evidence quality was assessed using Confidence in Network Meta-Analysis. The Minimum Clinically Important Difference was used to assess clinical efficacy.</p><p><strong>Results: </strong>The optimal exercise dose for overall motor symptom improvement was 1300 MET-min/week (mean difference: -6.07, 95 % credible intervals: -8.10 to -4.01). Dance at 850 MET-min/week provided the greatest improvement (mean difference: -11.18, 95 % credible intervals: -16.01 to -6.22). Significant improvements were seen with doses as low as 60-100 MET-min/week for body weight support training, dance, resistance training, and sensory exercise. The Minimum Clinically Important Difference was achieved with doses exceeding 670 MET-min/week for overall exercise, and at lower doses for specific types: aerobic exercise (1100 MET-min/week), body weight support (420 MET-min/week), and dance (230 MET-min/week).</p><p><strong>Conclusions: </strong>The optimal exercise dose for alleviating motor symptoms in Parkinson's Disease patients is 1300 MET-min/week, with dance being most effective at 850 MET-min/week. These findings provide evidence-based recommendations for Parkinson's Disease management.</p>","PeriodicalId":16992,"journal":{"name":"Journal of science and medicine in sport","volume":" ","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143066297","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Performance effects of functional knee brace removal and prolonged use in healthy male athlete: Lower extremity power, acceleration, speed, and agility.","authors":"Neetu Rishiraj, Jack E Taunton, Willian Regan, Robert Woollard, Rob Lloyd-Smith, Brian Niven","doi":"10.1016/j.jsams.2025.01.004","DOIUrl":"https://doi.org/10.1016/j.jsams.2025.01.004","url":null,"abstract":"<p><strong>Objectives: </strong>Knee braces were introduced to sports 30 years ago. However, knee brace use for non-contact anterior cruciate ligament injury prevention intervention remains contentious due to concerns about performance hindrances. Since knee brace use is a potential modifiable risk factor, we aimed to investigate the effect of discounting and continued functional knee brace (FKB) on lower extremity power-vertical jump (VJ), acceleration, speed, and agility performance.</p><p><strong>Design: </strong>Prospective cohort crossover study.</p><p><strong>Methods: </strong>Twenty-seven healthy male athletes performed seven tests, over six days of 12 test sessions (S), during three test conditions (non-braced, braced, and removed brace or continued brace use). This study focuses on VJ, acceleration, speed, and agility performance during S12 when athletes were randomly selected to remove the FKB after 17.5 h or continue using the FKB for 21.0 h.</p><p><strong>Results: </strong>After brace removal, nonsignificant performance levels improved in the VJ (2.7 %; 95 % CI 52.5-62.8; Cohen's effect size (ES) = trivial), acceleration (1.8 %; 95 % CI 0.500-0.562; ES = small), and agility (0.5 %; 95 % CI 9.25-10.13; ES = trivial), while a nonsignificant slower speed was recorded (0.5 %; 95 % CI 1.81-1.95; ES = trivial). Continued brace use led to a nonsignificant performance improvement in all tests; VJ (3.1 %; 95 % CI 53.5-60.2; ES = small), acceleration (1.5 %; 95 % CI 0.511-0.561; ES = trivial), speed (1.0 %; 95 % CI 1.83-1.95; ES = trivial), and agility (1.8 %; 95 % CI 9.26-10.04; ES = trivial).</p><p><strong>Conclusions: </strong>Removal of FKB led to improved performance in three performance tests, while continued brace use improved performance in all four tests.</p>","PeriodicalId":16992,"journal":{"name":"Journal of science and medicine in sport","volume":" ","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143007361","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}