Journal of Sports Medicine and Physical Fitness最新文献

{"title":"Gender differences in three-dimensional pelvic behavior during maximal sprint running.","authors":"Kazuki Ota, Takuya Yoshida, Hirohiko Maemura, Satoru Tanigawa","doi":"10.23736/S0022-4707.25.16415-3","DOIUrl":"10.23736/S0022-4707.25.16415-3","url":null,"abstract":"<p><strong>Background: </strong>Previous studies on joint kinetics in female during maximal sprinting have been limited to lower-limb kinetics; however, we hypothesized that female's sprinters have greater lumbosacral free leg side lateral flexion torque and lower lumbosacral free leg side torsional torque than male's sprinters. The present study aimed to examine the stiffness parameters, three-dimensional pelvic behavior, and kinetics in female's sprinters compared with male's sprinters.</p><p><strong>Methods: </strong>The three-dimensional (3D) kinematics and force data during regular 60-m sprints starting from a crouching start position in eight female's and male's sprinters were captured using a motion capture system and force platform. Stiffness parameters, three-dimensional pelvic behavior, and kinetics were calculated.</p><p><strong>Results: </strong>Female's sprinters had significantly lower vertical stiffness compared to male's sprinters. Additionally, female's sprinters had significantly the greater lateral flexion of the pelvis toward the free leg side angle and integrated contributory component of the free leg side lateral flexion angular impulse during the stance phase compared to male's sprinters. Furthermore, female's sprinters had significantly lower step frequency and an integrated contributory component of the free leg side rotation angular impulse during the stance phase and in total compared to male's sprinters.</p><p><strong>Conclusions: </strong>The lateral flexion of the pelvis toward the free leg side observed in female's sprinters during stance leg toe-off may contribute to the upward movement center of mass. The lower lumbosacral torsional torque towards the free leg side in female's sprinters may lead to delayed leg recovery motion after stance leg toe-off, resulting in a lower step frequency.</p>","PeriodicalId":17013,"journal":{"name":"Journal of Sports Medicine and Physical Fitness","volume":" ","pages":"873-882"},"PeriodicalIF":1.2,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143710431","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":"Pretraining warm-ups and localized pain may be associated with CrossFit-related injuries: nationwide cross-sectional study.","authors":"Ohad Segal, Shay Mindlin, Yuval Glick, Shai Shemesh, Ran Atzmon, Michael Drexler, Ronen Blecher","doi":"10.23736/S0022-4707.25.16637-1","DOIUrl":"10.23736/S0022-4707.25.16637-1","url":null,"abstract":"<p><strong>Background: </strong>Developed in recent years, CrossFit has gained much popularity in the industrialized world due to various advantages such as scalability, availability and high sense of community. Nonetheless, with growing interest, reports on associated injury have also emerged, highlighting the need for better characterization and analysis of specific risk factors. Our goal was therefore to characterize injuries related to CrossFit and to describe specific risk factors associated with their occurrence.</p><p><strong>Methods: </strong>We conducted a cross-sectional study by using a questionnaire aimed at CrossFit athletes responding to personally delivered questionnaires nationwide.</p><p><strong>Results: </strong>A total of 502 fully answered our questionnaire. Athletes who reported injury had a slightly higher mean weight (P=0.065) and Body Mass Index (P=0.059) compared to their non-injured counterparts and the most affected area was the upper extremity (N.=133, 26.4%) followed by the shoulder (N.=101, 20.1%). Athletes who performed preworkout warmup exercises were significantly more prone to report an injury (P=0.007) as well as those who had prior injury in the affected area. Backward stepwise regression model assessing injury predictors revealed that preworkout warmup (OR 1.816; 95% CI 1.095-3.011; P=0.021) and preinjury local pain (OR 1.554; 95% CI 1.004-2.046; P=0.048) in CrossFit athletes were significant predictors of injuries.</p><p><strong>Conclusions: </strong>Pretraining warm-ups and preinjury localized pain were found to predict significant injury among CrossFit athletes.</p>","PeriodicalId":17013,"journal":{"name":"Journal of Sports Medicine and Physical Fitness","volume":" ","pages":"939-944"},"PeriodicalIF":1.2,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143391218","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":"Numbers do not lie, but they can mislead: rethinking what doping prevalence statistics really mean.","authors":"Andrea Petróczi","doi":"10.23736/S0022-4707.25.17281-2","DOIUrl":"https://doi.org/10.23736/S0022-4707.25.17281-2","url":null,"abstract":"","PeriodicalId":17013,"journal":{"name":"Journal of Sports Medicine and Physical Fitness","volume":"65 7","pages":"835-838"},"PeriodicalIF":1.2,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144528511","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":"Acute effects of electrical muscle stimulation on energy metabolism during weight-bearing exercise in young-female: a crossover randomized controlled trial.","authors":"Juseong Lee, Seung W Shin, Junghoon Kim","doi":"10.23736/S0022-4707.25.16158-6","DOIUrl":"10.23736/S0022-4707.25.16158-6","url":null,"abstract":"<p><strong>Background: </strong>Electrical muscle stimulation is an effective tool that provides additional benefits to energy metabolism, such as energy expenditure. However, it remains unclear which energy system influences the increase in energy expenditure during electrical muscle stimulation. The aim of this study was to determine the contribution of three energy systems (aerobic, anaerobic lactic, and anaerobic alactic) during a single session of weight-bearing exercise with EMS using a crossover randomized controlled trial.</p><p><strong>Methods: </strong>Ten young females (mean age: 23.0±3.6 years) were randomly assigned to perform two types of exercises in a random order (WB: weight-bearing exercises without electrical muscle stimulation, N.=10; WB+EMS: weight-bearing exercises with electrical muscle stimulation, N.=10). During both sessions, we evaluated the oxygen consumption (absolute and relative), blood lactate concentration (before and after exercise), and heart rate. We then calculated the energy expenditure and percentage for the three energy systems.</p><p><strong>Results: </strong>WB+EMS showed significantly higher oxygen consumption (P=0.016, effect size; d=0.94) than WB. The total energy expenditure was 25.7% higher in WB+EMS than in WB (84.4±17.1 vs. 67.1±15.4 kcal, P=0.045, d=0.74). In addition, the energy expenditure of the anaerobic lactic system was significantly higher in the WB+EMS (P=0.009, d=1.06).</p><p><strong>Conclusions: </strong>These findings suggest that electrical muscle stimulation can contribute to an increased energy metabolism, particularly in the anaerobic energy system, even when performing the same type and duration of exercise.</p>","PeriodicalId":17013,"journal":{"name":"Journal of Sports Medicine and Physical Fitness","volume":" ","pages":"856-864"},"PeriodicalIF":1.2,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143710401","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":"Lovebird beak sign of medial meniscus flap lesion on transverse MRI view.","authors":"Vasileios Giovanoulis, Angelo V Vasiliadis, Az-Eddine Djebara, Nicolas Pujol","doi":"10.23736/S0022-4707.25.16860-6","DOIUrl":"10.23736/S0022-4707.25.16860-6","url":null,"abstract":"","PeriodicalId":17013,"journal":{"name":"Journal of Sports Medicine and Physical Fitness","volume":" ","pages":"985-986"},"PeriodicalIF":1.2,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144016182","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":"Characteristics of trunk and pelvic kinematics during batting motion in baseball players with low back pain history.","authors":"Kanta Kitabayashi, Akihiro Tamura, Masami Saito, Yusuke Nishida","doi":"10.23736/S0022-4707.25.16489-X","DOIUrl":"10.23736/S0022-4707.25.16489-X","url":null,"abstract":"<p><strong>Background: </strong>The batting motion has been reported to have a possible association with the development of low back pain (LBP) in baseball players. This study aimed to identify the kinematics of the batting motion in baseball players with a history of LBP, focusing on rotational and extension movements of the pelvis and trunk.</p><p><strong>Methods: </strong>This study employed a cross-sectional design. Twenty-five experienced baseball players (age: 20.8±1.6 years; height: 173.4±6.3 cm; weight: 68.4±9.4 kg) were randomly recruited at the International University of Health and Welfare university, and all participants were classified into either the LBP (N.=13) or non-LBP (N.=12) group. The joint angles of the trunk and pelvis were measured during batting motion with a three-dimensional motion analysis system.</p><p><strong>Results: </strong>The LBP group showed a significantly smaller trunk rotation and pelvis posterior tilt angle and earlier timing of trunk rotation to the batting side as compared to the non-LBP group (P<0.05).</p><p><strong>Conclusions: </strong>This study revealed that experienced players with no history of LBP showed a delay in the timing of trunk rotation to the batting side while increasing the trunk rotation angle to the non-batting side to efficiently transfer the rotational energy generated from the lower limbs to the trunk and the upper limbs. Conversely, players with a history of LBP might have repeated inefficient motion in the process of transferring rotational energy generated by the lower extremities, pelvis, and trunk to the upper extremities.</p>","PeriodicalId":17013,"journal":{"name":"Journal of Sports Medicine and Physical Fitness","volume":" ","pages":"924-931"},"PeriodicalIF":1.2,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143573298","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":"Anti-doping rules violations in modern Olympic games.","authors":"Ramananda Ningthoujam","doi":"10.23736/S0022-4707.25.16691-7","DOIUrl":"10.23736/S0022-4707.25.16691-7","url":null,"abstract":"<p><strong>Background: </strong>Doping persists as a significant challenge in Olympic sports despite stringent anti-doping measures. This study investigates doping prevalence, including total cases, commonly affected sports, frequently used substances, and most implicated countries, in the Summer and Winter Olympics from 1968 to 2022. This study aims to analyze doping trends across the Olympic Games from 1968 to 2022, identify patterns in doping violations, and assess the impact of anti-doping policies and detection advancements on reducing doping prevalence. A retrospective analysis of anti-doping rules violations (ADRVs) was conducted using publicly available data from the International Olympic Committee and the International Testing Agency.</p><p><strong>Methods: </strong>Data from the Summer and Winter Olympics, including the number of doping tests conducted, ADRVs recorded, and re-analysis outcomes, were examined. A focus was placed on key doping incidents from 2004 to 2012, the sports most affected, and the countries involved. The study also reviewed literature on the impact of anti-doping technologies, such as the athlete biological passport. Descriptive statistics were used to quantify doping trends, highlighting the number of tests, ADRVs, and revoked medals over time. Comparative analyses assessed the differences in doping prevalence across sports, countries, and time periods.</p><p><strong>Results: </strong>From 1968 to 2020, the number of tests conducted at the Summer Olympics increased from 667 to 5,033, with 250 confirmed doping cases and 143 medals revoked due to ADRVs. In the Winter Olympics, testing increased from 86 tests in 1968 to 3,166 in 2022, with 52 confirmed doping cases and 14 medals revoked. Weightlifting and athletics were the most affected in the Summer Games, while cross-country skiing led in the Winter Games. Russia was the most implicated country, particularly during the 2014 Sochi Winter Olympics. The introduction of retrospective testing identified a significant portion of violations, with 73 out of 82 cases in 2012 London discovered post-games.</p><p><strong>Conclusions: </strong>Doping trends reveal the ongoing challenge of maintaining clean competition despite increased testing and policy enforcement. Retrospective testing has been critical in uncovering violations, underscoring the limitations of real-time detection. Continued investment in advanced detection methods, international collaboration, and enhanced education are essential to mitigating doping and preserving the integrity of the Olympic Games.</p>","PeriodicalId":17013,"journal":{"name":"Journal of Sports Medicine and Physical Fitness","volume":" ","pages":"974-980"},"PeriodicalIF":1.2,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143674096","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":"Acute effects of overload strength training on vertical jump performance in young female volleyball players.","authors":"Ignazio Leale, Guglielmo Pillitteri, Valerio Giustino, Orazio Scarpa, Provvidenza Cataldo, Manuel Gómez-López, Giuseppe Battaglia","doi":"10.23736/S0022-4707.25.16497-9","DOIUrl":"10.23736/S0022-4707.25.16497-9","url":null,"abstract":"<p><strong>Background: </strong>The vertical jump performance is one of the most used parameters for the evaluation of lower limb strength in volleyball. Indeed, vertical jumps are frequently performed by volleyball players during the match both in defensive and offensive actions. This study aimed to evaluate the acute effects of a 90-minute strength training session (STS) with different overload intensities on vertical jump performance and on rating of perceived exertion (RPE) in young female volleyball players.</p><p><strong>Methods: </strong>Ten young female volleyball players (14.00±1.01 years; 165±0.03 cm; 58.33±10.25 kg; 21.52±3.84 kg/m²) were included in this randomized crossover study. The participants were subjected to the three following STS: STS-A without overload; STS-B with 10% body weight (BW) overload; and STS-C with 20% BW overload. The RPE for the three sessions was recorded using the modified 20-point Borg Scale. For the evaluation of lower limb strength, the following tests were used: squat jump (SJ), countermovement jump with hands on the hips (CMJ), and countermovement jump with arm swing (CMJ-AS).</p><p><strong>Results: </strong>Although a significant interaction was detected after the STS, no significant changes were observed among the three sessions (i.e., STS-A, STS-B, and STS-C). No differences were detected in the Borg Scale across the three sessions.</p><p><strong>Conclusions: </strong>This study showed that a STS administered without load or with an overload of 10% or 20% of BW, does not lead to significant changes on vertical jump performance in young volleyball players.</p>","PeriodicalId":17013,"journal":{"name":"Journal of Sports Medicine and Physical Fitness","volume":" ","pages":"891-899"},"PeriodicalIF":1.2,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143970892","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":"Vastus lateralis stiffness in roller speed skate athletes evaluated with sonoelastography. When sport meets health.","authors":"Giulia Bongiorno, Benedetta Zampa, Luca Miceli","doi":"10.23736/S0022-4707.25.16531-6","DOIUrl":"10.23736/S0022-4707.25.16531-6","url":null,"abstract":"","PeriodicalId":17013,"journal":{"name":"Journal of Sports Medicine and Physical Fitness","volume":" ","pages":"982-983"},"PeriodicalIF":1.2,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143657462","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":"Elite athletes technical skills and strength in run, roller speed skating and ice speed skating performances.","authors":"Giulia Bongiorno, Giulio Sisti, Francesca Dal Mas, Helena Biancuzzi, Francesco G Minisini, Luca Miceli","doi":"10.23736/S0022-4707.25.16669-3","DOIUrl":"10.23736/S0022-4707.25.16669-3","url":null,"abstract":"","PeriodicalId":17013,"journal":{"name":"Journal of Sports Medicine and Physical Fitness","volume":" ","pages":"981-982"},"PeriodicalIF":1.2,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143625106","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}