Journal of Sports Medicine and Physical Fitness最新文献_第5页

Effects of sports drinks with different molecular weight carbohydrates on rehydration during endurance exercise: a comparative study. 不同分子量碳水化合物运动饮料对耐力运动补液影响的比较研究。

IF 1.2 4区医学

Journal of Sports Medicine and Physical Fitness Pub Date : 2025-04-23 DOI: 10.23736/S0022-4707.25.16364-0

Qiushi Tan, Zhiguang Zhao, Aiqi Yu, Mai Xiang, Qi Han, Jingyi Zhu, Xuemei Sui, Qirong Wang

{"title":"Effects of sports drinks with different molecular weight carbohydrates on rehydration during endurance exercise: a comparative study.","authors":"Qiushi Tan, Zhiguang Zhao, Aiqi Yu, Mai Xiang, Qi Han, Jingyi Zhu, Xuemei Sui, Qirong Wang","doi":"10.23736/S0022-4707.25.16364-0","DOIUrl":"https://doi.org/10.23736/S0022-4707.25.16364-0","url":null,"abstract":"Background: The aim of this study was to compare the impacts of low-molecular-weight (LMW) and high-molecular-weight (HMW) carbohydrate (CHO) sports drinks on rehydration during endurance exercise.Methods: Ten middle- and long-distance running athletes were selected in a randomized, double-blind, cross-over design. One day before the experiment, a pre-experiment was performed to determine the VO<inf>2peak</inf>. The formal experiment consisted of a two-stage exercise test. In the first test, participants rode an electrically braked cycle ergometer for 1 hour with an intensity of 70%VO<inf>2peak</inf> and were supplemented with three kinds of sports drinks, namely, LMW CHO (oligosaccharides), HMW CHO (Vitargo), and placebo (PLA), at 1.8 mL/kg·bw every 15 minutes. Venous blood, capillary blood, and urine were collected during exercise. The second test was conducted 6 hours after the first test and employed an intensity of 75%VO<inf>2peak</inf> and the same rehydration strategy. The rate of perceived exertion (RPE) was recorded every 15 minutes until exhaustion, and the time to exhaustion (TTE) was recorded.Results: The percentage of body weight loss before and after exercise was significantly lower in the LMW group than in the HMW group (P<0.05). The serum or urine Na+, K+, and Cl- concentrations did not significantly differ among the groups (P>0.05). No significant differences in plasma osmolarity, urine osmolarity, lactic acid, blood pH, or exercise exhaustion time were found among the groups (P>0.05).Conclusions: Sports drinks containing LMW CHO were better at maintaining hydration than those containing HMW CHO. Sports drinks with different molecular weights of CHO had no significant effect on athletic performance or blood pH.","PeriodicalId":17013,"journal":{"name":"Journal of Sports Medicine and Physical Fitness","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143998502","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

Runner's toenail: how does marathon training lead to runner's toenail injuries? 跑步者的脚趾甲：马拉松训练是如何导致跑步者的脚趾甲受伤的？

IF 1.2 4区医学

Journal of Sports Medicine and Physical Fitness Pub Date : 2025-04-23 DOI: 10.23736/S0022-4707.25.16689-9

Angelo V Vasiliadis, Vasileios Giovanoulis

引用次数: 0

Composite and inter-individual force and neuromuscular responses to a handgrip hold to failure anchored to a moderate perceptual intensity. 复合的和个体间的力量和神经肌肉对握握失败的反应锚定在中等知觉强度。

IF 1.2 4区医学

Journal of Sports Medicine and Physical Fitness Pub Date : 2025-04-15 DOI: 10.23736/S0022-4707.24.16480-8

Minyoung Kwak, Pasquale J Succi, Brian Benitez, Clara J Mitchinson, Haley C Bergstrom

{"title":"Composite and inter-individual force and neuromuscular responses to a handgrip hold to failure anchored to a moderate perceptual intensity.","authors":"Minyoung Kwak, Pasquale J Succi, Brian Benitez, Clara J Mitchinson, Haley C Bergstrom","doi":"10.23736/S0022-4707.24.16480-8","DOIUrl":"https://doi.org/10.23736/S0022-4707.24.16480-8","url":null,"abstract":"Background: The application of the rating of perceived exertion (RPE)-clamp model has allowed for the examination of unique physio-psychological fatigue mechanisms in humans. This study examined the time course of composite and inter-individual responses in force, electromyographic (EMG) and mechanomyographic (MMG) amplitude (AMP) and mean power frequency (MPF), and neuromuscular efficiency (NME) during a sustained, isometric handgrip hold to failure (HTF) anchored to RPE of 5 (RPE=5) on 0-10 omnibus-resistance RPE scale in females.Methods: Twelve females performed a handgrip HTF at RPE=5 while force (N), EMG and MMG AMP and MPF, and NME (normalized force/normalized EMG AMP) were recorded on the brachioradialis of the dominant arm. Separate, polynomial regression analyses were used to determine the individual and composite relationships for the normalized force, EMG and MMG AMP and MPF, and NME versus normalized time during the HTF at RPE=5.Results: The time to task failure for the handgrip HTF at RPE=5 was 585.3±445.6 sec. There were linear and quadratic decreases in force and neuromuscular parameters (P≤0.05) for the composite responses. However, there was inter-individual variability in the patterns of these responses.Conclusions: To maintain a moderate perceptual intensity over time, it was necessary to voluntarily decrease force, muscle excitation, motor unit recruitment and firing rates, but there were also likely fatigue-induced, intramuscular, metabolic perturbations. However, the variability in force and neuromuscular responses suggested that these responses should be examined on a subject-by-subject basis to provide better insight into fatigue mechanisms across different conditions of RPE-clamp exercise.","PeriodicalId":17013,"journal":{"name":"Journal of Sports Medicine and Physical Fitness","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143989030","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

Lovebird beak sign of medial meniscus flap lesion on transverse MRI view. 内侧半月板瓣病变在MRI横切面上的爱鸟喙征。

IF 1.2 4区医学

Journal of Sports Medicine and Physical Fitness Pub Date : 2025-04-15 DOI: 10.23736/S0022-4707.25.16860-6

Vasileios Giovanoulis, Angelo V Vasiliadis, Az-Eddine Djebara, Nicolas Pujol

引用次数: 0

Peak torque and eccentric rate of torque development of the hamstrings might not be reflected by contractile properties measured by tensiomyography. 腘绳肌的峰值扭矩和偏心扭矩发展速度可能无法通过拉伸肌电图测量的收缩特性反映出来。

IF 1.2 4区医学

Journal of Sports Medicine and Physical Fitness Pub Date : 2025-04-01 Epub Date: 2024-11-04 DOI: 10.23736/S0022-4707.24.16465-1

Sebastian Puschkasch-Möck, Christoph Skutschik, Carsten Schwiete, Michael Behringer

{"title":"Peak torque and eccentric rate of torque development of the hamstrings might not be reflected by contractile properties measured by tensiomyography.","authors":"Sebastian Puschkasch-Möck, Christoph Skutschik, Carsten Schwiete, Michael Behringer","doi":"10.23736/S0022-4707.24.16465-1","DOIUrl":"10.23736/S0022-4707.24.16465-1","url":null,"abstract":"Background: Eccentric maximum strength and explosive force production of the hamstrings are crucial for performance in many sports. Tensiomyography (TMG has been shown to be a valuable tool to assess muscle contractility and function. For eccentric force production, neural activation has been proposed to be the predominant influencing factor. Nevertheless, high muscle fiber tension has to be generated. Therefore, this study aims to test the hypothesis that eccentric force production does not correlate with muscle contractility measured by TMG.Methods: Twenty-three physical active males (26.09±3.25 years) performed maximal eccentric hamstring contractions at 210 °/s on an isokinetic dynamometer. Additionally, TMG measurements were conducted on the biceps femoris. Contraction time, delay time, maximal deformation and contraction velocity were derived and investigated. Spearman correlations between the TMG parameters and maximum torque, rate of torque development (RTD) and time to peak torque were calculated. Furthermore, Kruskal Wallis test was calculated for the TMG parameters between the top and bottom participants according to RTD.Results: The correlation analysis showed no significant relationships between the TMG parameters and eccentric force production (P>0.05 for all comparisons). For the comparison between the high RTD group and the low RTD group, no significant differences in muscle contractility could be observed.Conclusions: The results of the present study suggest that muscle contractile properties play a minor role in eccentric force production. Therefore, TMG measures seem not to be suitable to investigate eccentric behavior.","PeriodicalId":17013,"journal":{"name":"Journal of Sports Medicine and Physical Fitness","volume":" ","pages":"517-523"},"PeriodicalIF":1.2,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142568698","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 fatigue on neuromuscular and biomechanical variables after anterior cruciate ligament reconstruction: a systematic review. 前交叉韧带重建后疲劳对神经肌肉和生物力学变量的影响：系统回顾。

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/S0022-4707.24.16210-X

Komeil D Rostami, Abbey Thomas, Aynollah Naderi

{"title":"Effect of fatigue on neuromuscular and biomechanical variables after anterior cruciate ligament reconstruction: a systematic review.","authors":"Komeil D Rostami, Abbey Thomas, Aynollah Naderi","doi":"10.23736/S0022-4707.24.16210-X","DOIUrl":"10.23736/S0022-4707.24.16210-X","url":null,"abstract":"Introduction: This systematic review is aimed to evaluate the outcomes of published studies on the topic of fatigue-induced neuromuscular and biomechanical changes after anterior cruciate ligament (ACL) reconstruction.Evidence acquisition: The identification of studies involved a search across three databases - PubMed, Scopus, and Sportdiscus - until July 2023. The key terms utilized were fatigue, anterior cruciate ligament, biomechanics, electromyography, and landing. Included in the analysis were studies that examined the impact of fatigue on neuromuscular or biomechanical variables in individuals with ACLR, with comparisons drawn to either the contralateral side or healthy controls.Evidence synthesis: Fourteen studies, involving 396 athletes (245 males, 151 females; mean age 23.43 years) met the inclusion criteria. Among these studies, eleven employed general fatigue protocols, and three used peripheral protocols. The tasks varied across the studies, including single-leg landing tasks, maximum voluntary isometric contraction tests, forward jump, and squat. Despite differing tasks, the findings regarding the impact of fatigue on lower limb kinematics, kinetics, and surface electromyography muscle activation patterns were inconsistent. However, in the majority of cases, the response to fatigue was similar between individuals who had undergone ACL reconstruction (ACLR) and healthy.Conclusions: The main finding of this systematic review was that fatigue changed things sometimes, however, fatigue did not change biomechanics and activity patterns differently in patients after ACLR vs. controls. General fatigue protocols did not produce enough stimulation to show deference between ACLRs and controls. Future studies should focus on different fatigue protocols (such as sport-specific protocols) and more challenging landing tasks.","PeriodicalId":17013,"journal":{"name":"Journal of Sports Medicine and Physical Fitness","volume":" ","pages":"554-561"},"PeriodicalIF":1.2,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142950649","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 aerobic and anaerobic training on freedivers' performance. 有氧和无氧训练对自由泳运动员成绩的影响。

IF 1.2 4区医学

Journal of Sports Medicine and Physical Fitness Pub Date : 2025-04-01 Epub Date: 2024-10-09 DOI: 10.23736/S0022-4707.24.16436-5

Ivan Drviš, Dario Vrdoljak, Lana Ružić, Goran Dujić, Željko Dujić, Nikola Foretić

{"title":"Effects of aerobic and anaerobic training on freedivers' performance.","authors":"Ivan Drviš, Dario Vrdoljak, Lana Ružić, Goran Dujić, Željko Dujić, Nikola Foretić","doi":"10.23736/S0022-4707.24.16436-5","DOIUrl":"10.23736/S0022-4707.24.16436-5","url":null,"abstract":"Background: Freediving is a sport that could be defined as both aerobic and anaerobic. Therefore, this study aimed to evaluate the effect of aerobic-anaerobic training on the performance of moderate and elite freedivers.Methods: The sample of participants included 26 freedivers (9 females) (average age of 26.62±3.34 years, body height of 178.95±9.19 cm, and body mass of 74.64±11.97 kg). The sample of variables included: anthropometric indices, relative maximal oxygen consumption (rVO<inf>2max</inf>), Diving anaerobic sprint test (DAST), Swimming anaerobic sprint test (SAST), 100-meter crawl sprint test (100 m), maximal dynamic apnea with monofin (DYN), maximal swimming length for 2 minutes (2 min). The study procedure included a 5-month aerobic-anaerobic training intervention. This intervention was conducted during a 4-phase (5-week each) training period.Results: The results showed that moderate group showed a significant decrease in 100 m (final 83.94±15.68; initial 88.29±16.73; P<0.00), DAST<inf>max</inf> (final 10.91±1.46; initial 12.01±1.38; P<0.00), DAST (final 70.29±8.95; initial 79.40±10.25; P<0.00), SAST<inf>max</inf> (final 16.81±2.24; initial 18.01±2.69; P<0.00), SAST(final 112.87±19.19; initial 122.65±21.55; P<0.00), and increase in 2 min (final 140.56±21.53; initial 128.68±19.33; P<0.00), and DYN (final 130.48±26.89; initial 91.65; P<0.00). Similarly, the elite group experienced a decrease in 100 m (final 72.18±9.77; initial 75.00±11.36; P=0.02), DAST<inf>max</inf> (final 10.14±0.95; initial 10.88±0.99; P=0.03), DAST (final 65.55±6.50; initial 71.24±7.32; P=0.02), SAST<inf>max</inf> (final 14.82±1.84; initial 15.76±1.80; P=0.03), and increase in DYN (final 194.94±27.70; initial 161.11±27.70; P<0.00).Conclusions: The results of this study demonstrate that dynamic apnea, as a main performance factor, had increase in all phases of procedure, with highest increase during anaerobic phases.","PeriodicalId":17013,"journal":{"name":"Journal of Sports Medicine and Physical Fitness","volume":" ","pages":"507-516"},"PeriodicalIF":1.2,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142391403","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

IF 1.2 4区医学

Journal of Sports Medicine and Physical Fitness Pub Date : 2025-04-01 Epub Date: 2024-12-02 DOI: 10.23736/S0022-4707.24.16136-1

Aleksandra Z Aleksić Veljković, Andrea S Marković, Mila D Vukadinović Jurišić, Jelena M Obradović, Borko D Katanić

{"title":"Age-related differences in postural stability and asymmetries among female rhythmic gymnasts: implications for injury prevention and performance enhancement.","authors":"Aleksandra Z Aleksić Veljković, Andrea S Marković, Mila D Vukadinović Jurišić, Jelena M Obradović, Borko D Katanić","doi":"10.23736/S0022-4707.24.16136-1","DOIUrl":"10.23736/S0022-4707.24.16136-1","url":null,"abstract":"Background: The purpose of this study was to determine age group differences in the postural stability of female rhythmic gymnasts, as well as the asymmetries in postural control between them.Methods: A total of 126 female rhythmic gymnasts (aged 6-12 years) were tested. The rhythmic gymnasts were grouped based on their age between 6-8 years (N.=45; young pioneers), 9-10 years (N.=36; pioneers), and 11-12 years (N.=45; cadets). Postural stability and asymmetry were evaluated by the Y-Balance Test (YBT) with both legs (right and left) in three directions: anterior, posteromedial, and posterolateral and Balance Error Scoring System (BESS). Postural stability was analyzed between age categories using the Kruskal-Wallis Test and Dunn's post-hoc test, and the differences in asymmetry were determined by univariate analysis of variance (ANOVA).Results: The young pioneers (age 6-8 years) had a greater number of errors in the single-leg foam stance and tandem foam stance than the 9-10-year-old and 11-12-year-old rhythmic gymnasts (P≤0.005). They also had a greater number of errors in BESS Total scores compared to other age categories (young pioneers 18.42±5.63; pioneers 15.08±4.78 and cadets 13.89±5.61; P≤0.005). Results showed significant differences (P≤0.005) between the young pioneers (age 6-8 years) and the cadets (age 11-12 years) in normalized left and right posteromedial reach direction. No significant differences (P≥0.005) in reach asymmetry were observed among age categories.Conclusions: In conclusion, 6-8-year-old rhythmic gymnasts (young pioneers) should have continuum screening during training and completion development.","PeriodicalId":17013,"journal":{"name":"Journal of Sports Medicine and Physical Fitness","volume":" ","pages":"546-553"},"PeriodicalIF":1.2,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142769976","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 eight-week aerobic and resistance training on health self-efficacy, body image, and well-being in college students. 八周有氧和阻力训练对大学生健康自我效能感、身体形象和幸福感的影响。

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/S0022-4707.24.16237-8

Chia-Lun Lee, Ying-Yan Lu, Zuway-R Hong, Nai-Jen Chang

{"title":"Effects of eight-week aerobic and resistance training on health self-efficacy, body image, and well-being in college students.","authors":"Chia-Lun Lee, Ying-Yan Lu, Zuway-R Hong, Nai-Jen Chang","doi":"10.23736/S0022-4707.24.16237-8","DOIUrl":"10.23736/S0022-4707.24.16237-8","url":null,"abstract":"Background: This study explored the effects of innovative physical training during COVID-19 periods on college students' health self-efficacy, body image, and subjective well-being.Methods: Forty-one students were recruited through convenience sampling and assigned to three exercise groups (i.e., aerobic plus resistance exercise [AE+RE], resistance plus aerobic exercise [RE+AE], and traditional dispersed aerobic plus resistance exercise [control]). The intervention sessions for each group were conducted 3 days per week for 30 min per session. The control group participated in a traditional exercise program comprising 5 days per week.Results: Study results indicated that all three types of physical training programs effectively improved the participants' health self-efficacy (P<0.05). Female students scored significantly higher on health self-efficacy, body image, and subjective well-being than male students (P<0.05). The AE+RE group scored significantly higher on body image and subjective well-being than did the other two groups (RE+AE and control, P<0.05).Conclusions: This study provides valuable insights that can assist in developing innovative physical education courses at higher education institutions to improve body satisfaction and well-being for the college students.","PeriodicalId":17013,"journal":{"name":"Journal of Sports Medicine and Physical Fitness","volume":" ","pages":"583-597"},"PeriodicalIF":1.2,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142950656","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

Exploring the impact of high altitude on physiological parameters and training characteristics of endurance runners. 探讨高海拔对耐力跑者生理参数及训练特点的影响。

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/S0022-4707.24.16601-7

Roberto Codella, Luca Filipas, Antonio LA Torre

引用次数: 0