Journal of Sports Medicine and Physical Fitness最新文献_第2页

Effects of neuromuscular fatigue induced by various modes of isometric handgrip exercise on post-exercise blood pressure responses. 不同模式的等长手握运动引起的神经肌肉疲劳对运动后血压反应的影响。

IF 1.2 4区医学

Journal of Sports Medicine and Physical Fitness Pub Date : 2025-04-01 Epub Date: 2024-12-09 DOI: 10.23736/S0022-4707.24.16529-2

Hao Zhu, Li He, Jiaqi Guo, Binfeng Huang, Jeannette Elliott, Yih-Kuen Jan

{"title":"Effects of neuromuscular fatigue induced by various modes of isometric handgrip exercise on post-exercise blood pressure responses.","authors":"Hao Zhu, Li He, Jiaqi Guo, Binfeng Huang, Jeannette Elliott, Yih-Kuen Jan","doi":"10.23736/S0022-4707.24.16529-2","DOIUrl":"10.23736/S0022-4707.24.16529-2","url":null,"abstract":"Background: Isometric handgrip exercise (IHE) is recommended as a non-pharmacological treatment for managing blood pressure. However, the effect of various modes of IHE on neuromuscular fatigue and post-exercise blood pressure responses have not been explored. The purpose of this study was to investigate the effects of the duration and muscle mass factors of IHE on post-exercise blood pressure responses.Methods: Twenty healthy participants were recruited for this repeated-measures study. Three isometric protocols with similar exercise load were conducted on 3 different days including: 1) unilateral IHE at 30% of maximal voluntary contraction (MVC) for 2 minutes; 2) bilateral IHE at 30% MVC for 1 minute; and 3) unilateral IHE at 20% MVC for 3 minutes. Each exercise had four bouts of IHE with two minutes of rest between bouts. The median frequency (MDF) and root mean square (RMS) of surface electromyography was used to assess the level of neuromuscular fatigue in the flexor digitorum superficialis (FDS), extensor carpi radialis longus (ECR), flexor carpi ulnaris (FCU), and extensor carpi ulnaris (ECU).Results: Correlation analysis revealed that FDS MDF fatigue during the bilateral IHE was moderately correlated with the immediate post-exercise systolic blood pressure change (SBP, r=0.456, P<0.05) and diastolic blood pressure change (DBP, r=0.682, P<0.01) and ten-minute post-exercise SBP change (r=0.510, P<0.05) and DBP change (r=0.569, P<0.01) during bilateral IHE at 30% MVC for 1 min. The RMS results indicate a significant correlation between ECR and DBP immediate post-exercise (r=-0.634, P<0.01) and DBP 10-minute post exercise (r=-0.484, P<0.05).Conclusions: This study suggests that neuromuscular fatigue of FDS and ECR of IHE are related to post-exercise blood pressure changes.","PeriodicalId":17013,"journal":{"name":"Journal of Sports Medicine and Physical Fitness","volume":" ","pages":"571-582"},"PeriodicalIF":1.2,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142801341","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}

引用次数: 0

Pre-race medical clearance in 60,609 distance running race entrants: which entrants sought clearance, what physicians did, and what was the outcome? SAFER XXXVII. 60,609名长跑参赛者的赛前体检：哪些参赛者寻求体检，医生做了什么，结果如何？37章更安全。

IF 1.2 4区医学

Journal of Sports Medicine and Physical Fitness Pub Date : 2025-04-01 Epub Date: 2025-01-09 DOI: 10.23736/S0022-4707.24.16523-1

Christili Muller, Martin Schwellnus, Dina C Janse VAN Rensburg, Esme Jordaan, Nicola Sewry

{"title":"Pre-race medical clearance in 60,609 distance running race entrants: which entrants sought clearance, what physicians did, and what was the outcome? SAFER XXXVII.","authors":"Christili Muller, Martin Schwellnus, Dina C Janse VAN Rensburg, Esme Jordaan, Nicola Sewry","doi":"10.23736/S0022-4707.24.16523-1","DOIUrl":"10.23736/S0022-4707.24.16523-1","url":null,"abstract":"Background: Medical clearance is often recommended for athletes prior to endurance exercise. The primary aim was to determine the percentage (%) of race entrants that sought medical clearance prior to participation in endurance running events, describe the diagnostic modalities used by doctors to assess entrants seeking medical clearance, and the clearance advice given. Secondary aims were to investigate the factors associated with seeking and outcome of clearance.Methods: All consenting race entrants who completed an online screening questionnaire during registration to participate in the 21.1 km or 56 km Two Oceans marathon races from 2013-2015 (N.=60,609) were included. Runners were stratified into four risk categories: low risk (LR), intermediate risk (IR), high risk (HR) and very high risk (VHR). Runners were asked if they consulted with a medical doctor to obtain medical clearance. Follow-up questions enquired about what the doctor did when they sought medical clearance and what advice the doctor gave as an outcome of the medical clearance consultation. Prevalence (%, 95% CI) and Prevalence Ratios (PRs) are reported.Results: Over the 3-year period, 14.8% of entrants sought medical clearance. For clearance, doctors used history only (9.9%), history and physical examination (36.7%) and history, physical examination, and special investigations (53.0%). Most entrants seeking medical clearance were fully cleared to race (87.7% in 21.1 km and 85.9% in 56 km) (P=0.0156). Factors associated with seeking medical clearance include longer race distance, older age and a higher risk category (P<0.0001).Conclusions: The methods doctors use when conducting medical clearance consultations vary greatly. Further research is suggested to develop a protocol that doctors can use for medical consultations.","PeriodicalId":17013,"journal":{"name":"Journal of Sports Medicine and Physical Fitness","volume":" ","pages":"562-570"},"PeriodicalIF":1.2,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142950685","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}

引用次数: 0

Discipline-specific adaptation patterns in respiratory and lower limb musculotendinous structures: cyclists vs. basketball players. 呼吸系统和下肢肌肉肌腱结构的学科特异性适应模式：自行车运动员与篮球运动员。

IF 1.2 4区医学

Journal of Sports Medicine and Physical Fitness Pub Date : 2025-04-01 Epub Date: 2024-10-28 DOI: 10.23736/S0022-4707.24.16429-8

Leonardo Cesanelli, Deividas Saveikis, Daniele Conte, Danguole Satkunskiene

{"title":"Discipline-specific adaptation patterns in respiratory and lower limb musculotendinous structures: cyclists vs. basketball players.","authors":"Leonardo Cesanelli, Deividas Saveikis, Daniele Conte, Danguole Satkunskiene","doi":"10.23736/S0022-4707.24.16429-8","DOIUrl":"10.23736/S0022-4707.24.16429-8","url":null,"abstract":"Background: This study aimed at assessing how chronic exposure to specific exercise training (high-intensity intervals vs. endurance), comparing experienced basketball-players (BP, N.=16), cyclists (CY, N.=16), and non-specifically trained individuals (CN, N.=16), influences the structural and functional characteristics of both lower limb and respiratory musculotendinous structures.Methods: Vastus lateralis, gastrocnemius lateralis, and medialis, diaphragm muscles, as well as patellar tendon and Achilles tendon, were assessed using B-mode ultrasonography. Maximal voluntary isometric and passive torque measurements were conducted in the knee-extensors and plantar-flexors. Additionally, a subset of participants (N.=10 for each group) underwent a fatigue-inducing exercise-till-exhaustion protocol, and the strength of lower limb and respiratory muscles was evaluated immediately before and after the trial.Results: Athletes had bigger and stronger musculotendinous structures and greater endurance to fatigue than CN (P<0.05). BP had bigger plantar-flexors and diaphragm, greater fascicles length, more explosive plantar-flexors and respiratory muscles and bigger tendons than CY (P<0.05). On the other hand, CY showed greater muscle pennation angle and greater endurance to fatigue for both, lower limb, and respiratory muscles (P<0.05).Conclusions: The present study emphasizes that chronic and specific exercise training leads to distinctive adaptations, not only in lower limb musculotendinous structures but also in other components such as respiratory muscles.","PeriodicalId":17013,"journal":{"name":"Journal of Sports Medicine and Physical Fitness","volume":" ","pages":"493-506"},"PeriodicalIF":1.2,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142502671","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}

引用次数: 0

Effect of ketosis induced by on delayed-onset muscle soreness, inflammation and redox status: a randomized, open-label, crossover pilot study. 酮症对迟发性肌肉酸痛、炎症和氧化还原状态的影响：一项随机、开放标签、交叉先导研究

IF 1.2 4区医学

Journal of Sports Medicine and Physical Fitness Pub Date : 2025-04-01 Epub Date: 2025-01-09 DOI: 10.23736/S0022-4707.24.16137-3

Yoshihiko Mano, Nobuo Fukuda

{"title":"Effect of ketosis induced by on delayed-onset muscle soreness, inflammation and redox status: a randomized, open-label, crossover pilot study.","authors":"Yoshihiko Mano, Nobuo Fukuda","doi":"10.23736/S0022-4707.24.16137-3","DOIUrl":"10.23736/S0022-4707.24.16137-3","url":null,"abstract":"Background: Previous studies show that ketosis caused by the consumption of low-carbohydrate diets improves cognitive functions and that ketogenic diets can be used to treat epilepsy. In vivo and in vitro experiments have shown that ketosis regulates pain, inflammation, and oxidative stress. Thus, we investigated the effects of ketosis induced by a low-carbohydrate diet on muscle soreness, inflammation, and redox status in human subjects.Methods: The research method was an open-label, crossover, pilot study. The study included eight men with no exercise habits associated with muscle soreness and consumed a low-carbohydrate and a normal diet for 6 days. Each dietary intake was for 3 days, and the participants performed the isotonic exercise on the fourth day. Before and after the exercise (immediately after, 24 h later, and 48 h later), the subjective value of muscle soreness, interleukin-6 level, tumor necrosis factor-alpha level, total ketone bodies, and redox status biomarkers were measured.Results: The results revealed that the low-carbohydrate-diet group showed no significant difference in the subjective value of muscle soreness, whereas the normal diet group showed a significant increase in the subjective muscle soreness scale after 24 h. There were no significant changes in biomarkers of inflammation and redox status in either group.Conclusions: This result suggests that ketosis caused by consuming a low-carbohydrate diet suppresses delayed-onset muscle soreness. However, the ketosis state did not suppress inflammation or oxidative stress markers.","PeriodicalId":17013,"journal":{"name":"Journal of Sports Medicine and Physical Fitness","volume":" ","pages":"531-538"},"PeriodicalIF":1.2,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142950650","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}

引用次数: 0

Effects of long-term volleyball training on multimodal responses in adolescent female athletes: a follow-up study. 长期排球训练对青少年女运动员多模态反应的影响：一项随访研究。

IF 1.2 4区医学

Journal of Sports Medicine and Physical Fitness Pub Date : 2025-04-01 Epub Date: 2025-01-09 DOI: 10.23736/S0022-4707.24.16116-6

Nobuo Yasuda

{"title":"Effects of long-term volleyball training on multimodal responses in adolescent female athletes: a follow-up study.","authors":"Nobuo Yasuda","doi":"10.23736/S0022-4707.24.16116-6","DOIUrl":"10.23736/S0022-4707.24.16116-6","url":null,"abstract":"Background: The aim of this study was to examine the effects of long-term (10 months) volleyball training on biochemical responses in adolescent female athletes since the cumulative effects of chronic training on this population are not yet clear.Methods: Twenty-one adolescent female volleyball players competing at the national level served as the participants. All athletes carried out volleyball training, which consisted of ball handling, specialized drills, and practical game-style exercises, including physical training in the school gymnasium. The average training cycle consisted of 6 days per week, with a total of about 2 to 2.5 hours of volleyball training per day. In order to determine the cumulative effects on autonomic, immune, renal function and bone resorption, salivary and urinary samples were collected before volleyball training on 3 consecutive days (days 1, 3 and 5) at months 0 and 10, respectively.Results: No significant changes in body mass, salivary secretion rate, urinary albumin, L-type fatty acid binding protein and type I collagen cross-linked N-telopeptide concentration were found. In contrast, significant decreases were noted in salivary α-amylase activity (% change: -22.9), total protein (%change: -21.4), and immunoglobulin A concentration (% change: -20.1).Conclusions: The results of this study imply that the autonomic function after chronic volleyball training in adolescent female athletes may be enhanced due to training adaptation, although the immune function may be attenuated as a result of cumulative overtraining. Moreover, long-term volleyball training in adolescent female athletes appears to suppress bone resorption and not to induce cumulative damage to renal function.","PeriodicalId":17013,"journal":{"name":"Journal of Sports Medicine and Physical Fitness","volume":" ","pages":"468-477"},"PeriodicalIF":1.2,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142950658","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}

引用次数: 0

Differences in landing biomechanics between adolescent athletes with anterior knee pain and healthy controls.

IF 1.2 4区医学

Journal of Sports Medicine and Physical Fitness Pub Date : 2025-03-28 DOI: 10.23736/S0022-4707.25.16495-5

Inje Lee, Sunghe Ha

{"title":"Differences in landing biomechanics between adolescent athletes with anterior knee pain and healthy controls.","authors":"Inje Lee, Sunghe Ha","doi":"10.23736/S0022-4707.25.16495-5","DOIUrl":"https://doi.org/10.23736/S0022-4707.25.16495-5","url":null,"abstract":"Background: The aim of this study was to identify differences in the landing biomechanics of adolescent athletes with anterior knee pain (AKP) compared with healthy controls.Methods: Ten adolescent athletes with AKP and 10 healthy controls performed landing tasks in order to analyze 3D lower-extremity joint angles, moment, and power, ground reaction force (GRF), and vertical stiffness. Time-series data were analyzed from initial contact (0%) to the point of maximum knee flexion (100%) using ensemble curve analyses, while discrete points were analyzed using the Mann-Whitney U Test.Results: The AKP group exhibited greater peak vertical GRF (vGRF), higher loading rates, and shorter time to peak vGRF (P<0.05) compared with controls. Ensemble curve analyses revealed greater vGRF (6-11%) in the AKP group. Sagittal plane examinations revealed the AKP group to have reduced plantar flexion angles (0-2%), dorsiflexion angles (43-100%), plantar flexor moments (11-100%), ankle shock absorption (17-20%, 23-38%, 56-59%), and knee extensor moments (51-89%) in the AKP group. Moreover, the AKP group exhibited greater knee shock absorption (14-18%), hip power generation (10-12%), and hip shock absorption (97-100%). In the frontal plane, AKP was associated with increased evertor moment (1-3%), knee valgus angle (0-6%), and hip abductor moment (6-8%). Transverse plane analysis showed the hip external-rotator moment to be greater (22-24%) among the AKP group.Conclusions: Our findings demonstrate the effects of AKP on landing biomechanics in adolescent athletes. These insights reveal potential injury mechanisms and may serve as a guide for the development of rehabilitation strategies.","PeriodicalId":17013,"journal":{"name":"Journal of Sports Medicine and Physical Fitness","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143730354","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}

引用次数: 0

Enhancing change of direction speed in young soccer players through running technique training.

IF 1.2 4区医学

Journal of Sports Medicine and Physical Fitness Pub Date : 2025-03-28 DOI: 10.23736/S0022-4707.25.16404-9

Marek Vrablanský, Filip Skala, Tomáš Vencúrik

{"title":"Enhancing change of direction speed in young soccer players through running technique training.","authors":"Marek Vrablanský, Filip Skala, Tomáš Vencúrik","doi":"10.23736/S0022-4707.25.16404-9","DOIUrl":"https://doi.org/10.23736/S0022-4707.25.16404-9","url":null,"abstract":"Background: This study explored the impact of running technique training on change of direction (COD) speed in young soccer players across the U11, U13, and U18 age categories.Methods: Eighty-nine players participated and were divided into experimental (COD training [CODT]) and control (CON) groups in each category. The CODT group underwent a 4-week training program, conducted twice a week for fifteen minutes before regular training sessions. Pre- and post-testing used the 505 and Pro-Agility (5-10-5) tests.Results: Results indicated significant improvements for CODT U11 players in the 505 Test on the right foot (P=0.04, d=0.48) and the 5-10-5 Test (P<0.001, d=0.86). The U13 CODT players improved in the 5-10-5 Test (P<0.001, d=0.54), as well as the CODT U18 (P=0.001, d=1.04). Significant differences between CODT and CON groups were observed in the U11 category in the 5-10-5 Test.Conclusions: The study concludes that running technique training before regular soccer sessions enhances COD speed, particularly in U11 and U18 players.","PeriodicalId":17013,"journal":{"name":"Journal of Sports Medicine and Physical Fitness","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143730356","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}

引用次数: 0

Knee strength difference between lower limbs and jump performance in athletes with patellar tendinopathy and healthy controls.

IF 1.2 4区医学

Journal of Sports Medicine and Physical Fitness Pub Date : 2025-03-28 DOI: 10.23736/S0022-4707.25.16444-X

Diego Ruffino, Matías Alfonso, Federico Villalba, Javier Asinari, Peter Malliaras

{"title":"Knee strength difference between lower limbs and jump performance in athletes with patellar tendinopathy and healthy controls.","authors":"Diego Ruffino, Matías Alfonso, Federico Villalba, Javier Asinari, Peter Malliaras","doi":"10.23736/S0022-4707.25.16444-X","DOIUrl":"https://doi.org/10.23736/S0022-4707.25.16444-X","url":null,"abstract":"Background: The aim of this case-control study was to compare knee strength and jump performance both in athletes with patellar tendinopathy (PT) compared to healthy controls.Methods: Eighty recreational athletes divided into 2 groups, patellar tendinopathy group (PTG; N.=40) and asymptomatic control group (CG; N.=40) matched by age, height, weight and sport participated in this study.Results: Six-Repetition Maximum (6RM) Test were conducted to estimate maximal isotonic muscular strength using leg extension and leg press machines, while vertical countermovement jump (CMJ) and triple hop for distance were performed to assess jumps capacity. An adjusted analysis revealed that the difference between the PT group and the asymptomatic group in CMJ was 11.024 cm (P value <0.001) and 0.18 m in triple hop (P value <0.001). Furthermore, the difference between both lower limbs in the PT group was 9.02 kg (P value <0.001) and 3.76 kg (P value = 0.02) in leg extension and leg press evaluations, respectively, compared to the control group, regardless of age, height, weight, and sports activity.Conclusions: Athletes with unilateral PT had impaired strength and single leg jumping performance compared with matched healthy controls, yet they have greater double leg jumping performance. There was less evidence for side-to-side impairment suggesting bilateral impairment.","PeriodicalId":17013,"journal":{"name":"Journal of Sports Medicine and Physical Fitness","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143730369","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}

引用次数: 0

No effect of menstrual cycle on maximum dynamic strength in upper and lower body in strength-trained females: a six-arm cross-over study.

IF 1.2 4区医学

Journal of Sports Medicine and Physical Fitness Pub Date : 2025-03-25 DOI: 10.23736/S0022-4707.25.16485-2

Christoph Zinner, Philipp Wirges, Stephan Geisler, Eduard Isenmann

{"title":"No effect of menstrual cycle on maximum dynamic strength in upper and lower body in strength-trained females: a six-arm cross-over study.","authors":"Christoph Zinner, Philipp Wirges, Stephan Geisler, Eduard Isenmann","doi":"10.23736/S0022-4707.25.16485-2","DOIUrl":"https://doi.org/10.23736/S0022-4707.25.16485-2","url":null,"abstract":"Background: The aim of this study was to compare maximal dynamic strength in the upper and lower body in six distinct phases of the menstrual cycle (MC) and well-being and pain sensation throughout the MC.Methods: Ten strength-trained young women (age: 25.7±1.4 years, Body Mass Index [BMI]: 25.2±3.6) were tested with a one-repetition maximum (1RM) in the deadlift (DL) and the bench press (BP). Furthermore, a questionnaire about pain perception and perceived stress was obtained from the participants at six points in time within three consecutive MCs with two measurements in each MC. These moments in time were in the early, middle, and late subphases in the follicular and luteal phases.Results: No differences were evident for absolute or relative 1RM for DL (P=0.82 and 0.73, respectively) and BP (P=0.99 and 0.99, respectively) over the MC. A time difference was detected in pain perception during the MC (P=0.02), but no influence on the stress score (P=0.52) was found.Conclusions: The MC does not influence the dynamic maximal strength in the upper and lower body. Even though pain perception changed during the MC this does not seem to have an impact on women's maximum strength in the DL and BP on a group level.","PeriodicalId":17013,"journal":{"name":"Journal of Sports Medicine and Physical Fitness","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143710433","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}

引用次数: 0

The impact of asymmetrical loading on tibial characteristics and bone strength in high-impact athletes.

IF 1.2 4区医学

Journal of Sports Medicine and Physical Fitness Pub Date : 2025-03-25 DOI: 10.23736/S0022-4707.25.16413-X

Reece J Scott, Craig Sale, Ruth James, Cleveland T Barnett, Ian Varley

{"title":"The impact of asymmetrical loading on tibial characteristics and bone strength in high-impact athletes.","authors":"Reece J Scott, Craig Sale, Ruth James, Cleveland T Barnett, Ian Varley","doi":"10.23736/S0022-4707.25.16413-X","DOIUrl":"https://doi.org/10.23736/S0022-4707.25.16413-X","url":null,"abstract":"Background: Asymmetrical athletes produce movements where the external load is unequally distributed in the lower extremities e.g., cricket fast bowling. Loading magnitude is known to affect bone adaptation. It is not understood if tibial characteristics differ between legs when they are exposed to different magnitudes of external load, as happens in asymmetrical athletes. This study aimed to assess the association between external load and tibial characteristics and compare the effect that asymmetrical loading has between legs in asymmetrical athletes. Footballers were recruited as a comparator group.Methods: Inertial measurement units (IMU) were placed at the 14% site of the anteromedial tibia to measure external load during habitual training. Whole body dual-energy X-ray absorptiometry (DXA) and tibial peripheral quantitative computed tomography (pQCT) scans were taken of the athlete within 2 weeks of the external load measurement.Results: Asymmetrical athletes experienced 34% higher peak acceleration and 28% higher peak positive acceleration (PPA) in the front leg compared to the back leg and showed greater bone mineral content (BMC; 2%) and torsional tibial strength (7%) in the front leg. Positive correlations were shown between cumulative load in the front leg and tibial strength (r=0.638; P=0.035) in asymmetrical athletes.Conclusions: Exposure to cumulative load showed higher tibial anteroposterior bone strength and transverse and torsional fracture resistance than the lesser loaded contralateral limb. The ability to monitor external load within the applied setting and how it impacts bone can help practitioners estimate the athletes' bone load throughout the season.","PeriodicalId":17013,"journal":{"name":"Journal of Sports Medicine and Physical Fitness","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143710463","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}

引用次数: 0