Liam Oliver, Stephen Goodman, John Sullivan, Jonathan Peake, Vincent Kelly
{"title":"Challenges and perspectives with understanding the concept of mental fatigue.","authors":"Liam Oliver, Stephen Goodman, John Sullivan, Jonathan Peake, Vincent Kelly","doi":"10.1055/a-2514-1195","DOIUrl":"10.1055/a-2514-1195","url":null,"abstract":"<p><p>Mental fatigue is referred to as a psychophysiological or neurobiological state caused by prolonged periods of demanding cognitive activity. Sport and exercise science research studies have investigated the effects of experimentally induced mental fatigue on cognitive performance, with mixed results. It has been suggested that negative effects of mental fatigue on cognition performance in laboratory studies could translate to impaired sport performance. However, it remains unclear if impairments in sport performance are due to mental fatigue and how mental fatigue may differ from physical fatigue. Fatigue is well understood as a complex multifactorial construct involving interactions between physiological and neuropsychological responses across brain regions. It may be prudent for researchers to return to the origins of fatigue and cognition before attempting to connect mental fatigue and sport cognition. This article reviews the concept of mental fatigue, its mechanisms and neuroanatomical basis, models of cognition relevant to sports science, investigates how mental fatigue may influence cognition, and suggests future research directions. Mental fatigue as a construct separated from fatigue could be an oversight that has hindered the development of our understanding of mental fatigue. Future sports science research could work to enhance our knowledge of our definitions of fatigue.</p>","PeriodicalId":14439,"journal":{"name":"International journal of sports medicine","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142949019","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":"Effects of additional scapular movements on the scapular muscle activity during arm raising.","authors":"Ilyoung Yu, Minhyeok Kang","doi":"10.1055/a-2525-3184","DOIUrl":"10.1055/a-2525-3184","url":null,"abstract":"<p><p>The effects of the two popular strategies, scapular adduction and depression and scapular posterior tilt, on the muscle activity of trapezius and serratus anterior muscles have not been compared. This study demonstrates the effects of additional scapular adduction and depression and scapular posterior tilt movements on the activation of trapezius and serratus anterior muscles and scapular kinematics during arm raising. Eighteen asymptomatic men performed arm raising tasks with and without additional scapular movements, including scapular adduction and depression and scapular posterior tilt. During all tasks, the muscle activity of the upper/middle/lower trapezius and serratus anterior muscles was measured using surface electromyography; scapular upward rotation and posterior tilt angles were measured using a smartphone application. Lower trapezius muscle activity significantly increased during arm raising with scapular adduction and depression (<i>p</i>=0.001) or scapular posterior tilt compared to preferred arm raising (<i>p</i><0.001). However, arm raising with the scapular posterior tilt showed significantly greater serratus anterior muscle activity (<i>p</i>=0.002) and scapular posterior tilt angle (<i>p</i>=0.001) together with lesser upper trapezius muscle activity (<i>p</i>=0.027) compared with those of scapular adduction and depression. Scapular posterior tilt may be effective for increasing the lower trapezius and serratus anterior muscle activity while reducing the upper trapezius muscle activity.</p>","PeriodicalId":14439,"journal":{"name":"International journal of sports medicine","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143038864","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}
Juliane Wieber, Abigail Preece, Robert Rein, Bjoern Braunstein
{"title":"Knee angle reproduction tests: influences of body orientation, movement direction and limb dominance.","authors":"Juliane Wieber, Abigail Preece, Robert Rein, Bjoern Braunstein","doi":"10.1055/a-2526-9372","DOIUrl":"https://doi.org/10.1055/a-2526-9372","url":null,"abstract":"<p><p>Applying joint position sense tests under different test conditions may introduce reproduction error bias, which can result in different therapeutic consequences. This study investigated the effects of body orientation, movement direction, and limb dominance on the active knee angle reproduction error. Subjects underwent active contralateral knee angle reproduction tests in a seated versus prone position, from a starting point of knee flexion versus knee extension, and with the dominant versus nondominant limb setting the target angle. The test order was randomly determined for each subject. The primary outcome was the absolute active knee angle reproduction error (°). The data of 54 healthy subjects (mean±standard deviation, age: 26±5 years, height: 174±11 cm, body mass: 69.9±14.4 kg, and Tegner activity score: 5.8±1.9) showed that the reproduction error was greater in the seated position than in the prone position. The use of the dominant limb as the reference limb was associated with significantly greater errors in the seated position, but not in the prone position. In conclusion, directly comparing the results obtained in the prone and seated positions is not recommended. However, the dominance of the reference limb might be relevant when testing patients and comparing healthy and injured knees.</p>","PeriodicalId":14439,"journal":{"name":"International journal of sports medicine","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143467943","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":"Epidemiology of fractures and care in male collegiate Taekwondo athletes by weight classes.","authors":"Haifang Wang, Sangcheol Yoo, Munku Song","doi":"10.1055/a-2519-1759","DOIUrl":"10.1055/a-2519-1759","url":null,"abstract":"<p><p>The purpose of this study was to examine the occurrence of fracture injuries and post-fracture management practices by weight classes. A total of 127 male collegiate Taekwondo athletes (64 lightweight athletes and 63 heavyweight athletes) participated in this study. The athletes were classified into lightweight and heavyweight based on their respective competition weight divisions. Logistic regression was used to estimate the odds ratios and 95% confidence intervals. Athletes had experienced fractures to 54.3%. Athletes were more likely to experience fractures during training and defensive movements. Of the fractures reported, 31.9% necessitated surgical intervention. Although 65.1% of the athletes were primarily concerned about the possibility of reinjury, only 36.2% received specialized rehabilitation. The heavyweight athletes had a higher prevalence of fractures (odds ratio=2.40 and 95% confidence interval=1.17-4.90) than the lightweight athletes. The heavyweight athletes had a higher prevalence of fractures during the competition (odds ratio=4.83 and 95% confidence interval=1.54-15.17), in offensive situations (odds ratio=4.67 and 95% confidence interval=1.38-15.99), and in the lower limbs (odds ratio=3.84 and 95% confidence interval=1.12-13.14) than the lightweight athletes. The current evidence that fractures are common in Taekwondo athletes and that fracture patterns may differ between heavyweight and lightweight athletes highlights the need for tailored prevention strategies based on weight classes.</p>","PeriodicalId":14439,"journal":{"name":"International journal of sports medicine","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143005296","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}
André Rebelo, João R Pereira, Gert Vande Broek, Manuel J Coelho-E-Silva, Marije T Elferink-Gemser, João Valente-Dos-Santos
{"title":"Optimizing recovery: the impact of training load in elite volleyball players.","authors":"André Rebelo, João R Pereira, Gert Vande Broek, Manuel J Coelho-E-Silva, Marije T Elferink-Gemser, João Valente-Dos-Santos","doi":"10.1055/a-2519-9330","DOIUrl":"https://doi.org/10.1055/a-2519-9330","url":null,"abstract":"<p><p>This study aimed to analyze the relationships between training load metrics and various dimensions of recovery over the course of 105 days during the competitive season. This study included 14 elite male volleyball players who participated in 95 training sessions and 18 matches. The session rating of perceived exertion and inertial measurement units were utilized to measure internal and external training loads, respectively. Biological recovery was assessed using the countermovement jump test, while social and psychological recoveries were measured through the RESTQ-Sport. Relationships were examined using linear mixed-effect models to account for repeated measures across players and time points. The results revealed that chronic external training loads negatively influenced the biological recovery, with increases in chronic external training loads associated with a longer time to take-off (<i>β</i>=- 0.008, <i>p</i>=0.03) and a reduced modified reactive strength index (<i>β</i>=- 0.008, <i>p</i>=0.047). Social recovery was influenced by internal training load metrics, with acute internal training loads increasing social stress (<i>β</i>=- 3.512, <i>p</i>=0.034). For psychological recovery, chronic internal training loads and the acute:chronic internal training load ratio were linked to higher emotional exhaustion (<i>β</i>=- 0.013, <i>p</i>=0.029; <i>β</i>=0.021, <i>p</i><0.001, respectively). These findings highlight the critical role of external load management in the biological recovery and the relevance of subjective internal load measures in monitoring social and psychological recovery dimensions. Coaches are encouraged to integrate time-based neuromuscular metrics and perceptual load assessments into their recovery monitoring protocols to optimize athletes' well-being and performance.</p>","PeriodicalId":14439,"journal":{"name":"International journal of sports medicine","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143414080","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}
Yiping Yan, Jingjing Jia, Bei Liu, Youzhi Ke, Yang Liu
{"title":"Adherence to 24-Hour Movement Guidelines before and during COVID-19 in children: A review.","authors":"Yiping Yan, Jingjing Jia, Bei Liu, Youzhi Ke, Yang Liu","doi":"10.1055/a-2464-3228","DOIUrl":"https://doi.org/10.1055/a-2464-3228","url":null,"abstract":"<p><p>This study aims to describe and compare adherence to the 24-Hour Movement Guidelines (recommendations for physical activity, screen time, and sleep duration) among children before and during COVID-19 pandemic . The literature search was conducted on Web of Science, PubMed, MEDLINE, and SPORTDiscus for quantitative studies on 24-hour movement behaviors, published in English. The studies were categorized by collection date into before the pandemic (June 16th, 2016 - March 10, 2020) and during the pandemic (March 11th, 2020 - May 5, 2023), with all studies included. A random-effects model was employed to synthesize the adherence rates, and subgroup analyses were conducted based on age, sex, region, and Human development index (HDI) groups. Before the pandemic, 12.1% (95% CI:10.3%-13.9%) of overall children met the three recommendations. During the pandemic, 8.6% (95% CI: 6.4%-11.4%) of overall children met the three recommendations. The adherence to the three recommendations during the pandemic was 3.5% lower (p<0.05) than before the pandemic, with significant regional differences (p<0.05). Most children fail to meet the guidelines in any period. The adherence to the three 24-Hour Movement Guidelines during the pandemic was lower than before, with varying degrees of low adherence across different groups.</p>","PeriodicalId":14439,"journal":{"name":"International journal of sports medicine","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143382424","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}
Xiaolin Yang, Yanchun Li, Dapeng Bao, Bing Yan, Tao Mei, Xiaoxi Liu, Pawel Cięszczyk, IldusI Ahmetov, LarsRobert Mc Naughton, Zihong He
{"title":"Genomic predictors of fat mass response to the standardized exercise training.","authors":"Xiaolin Yang, Yanchun Li, Dapeng Bao, Bing Yan, Tao Mei, Xiaoxi Liu, Pawel Cięszczyk, IldusI Ahmetov, LarsRobert Mc Naughton, Zihong He","doi":"10.1055/a-2421-9385","DOIUrl":"10.1055/a-2421-9385","url":null,"abstract":"<p><p>To explore the genetic architecture underlying exercise-induced fat mass change, we performed a genome-wide association study with a Chinese cohort consisting of 442 physically inactive healthy adults in response to a 12-week exercise training (High-intensity Interval Training or Resistance Training). The inter-individual response showed an exercise-induced fat mass change and ten novel lead SNPs were associated with the response on the level of P<1×10<sup>-5</sup>. Four of them (rs7187742, rs1467243, rs28629770 and rs10848501) showed a consistent effect direction in the European ancestry. The Polygenic Predictor Score (PPS) derived from ten lead SNPs, sex, baseline body mass and exercise protocols explained 40.3% of the variance in fat mass response, meanwhile importantly the PPS had the greatest contribution. Of note, the subjects whose PPS was lower than -9.301 had the highest response in exercise-induced fat loss. Finally, we highlight a series of pathways and biological processes regarding the fat mass response to exercise, e.g. apelin signaling pathway, insulin secretion pathway and fat cell differentiation biological process.</p>","PeriodicalId":14439,"journal":{"name":"International journal of sports medicine","volume":" ","pages":"127-136"},"PeriodicalIF":2.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142545418","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}
Matheus Simionato Firmino, Matheus S Norberto, Germano Marcolino Putti, Carolina Lemos de Oliveira, Bianka da Silva Rumayor, João Victor Gatto Torini, Marcelo Papoti
{"title":"High- and Low-carb Diet and Fasting State Modify Alternative Maximal Accumulated Oxygen Deficit.","authors":"Matheus Simionato Firmino, Matheus S Norberto, Germano Marcolino Putti, Carolina Lemos de Oliveira, Bianka da Silva Rumayor, João Victor Gatto Torini, Marcelo Papoti","doi":"10.1055/a-2373-0102","DOIUrl":"10.1055/a-2373-0102","url":null,"abstract":"<p><p>This investigation aimed to assess whether the alternative method of estimating the maximal accumulated oxygen deficit (MAOD<sub>alt</sub>) can detect changes in energy system contribution in different substrate availabilities. Following a graded exercise test to determine maximal oxygen uptake intensity (iVO<sub>2max</sub>), 26 recreational runners performed a time to exhaustion effort (TTE) as baseline at 110% iVO<sub>2max</sub>. The same TTE was performed in fasting state, then, a muscle glycogen depletion protocol was executed. Subsequently, participants received a low-carbohydrate diet and beverages containing high (H-CHO, 10.8±2.1 g·kg<sup>- 1</sup>), moderate (M-CHO, 5.6±1.1 g·kg<sup>- 1</sup>), or zero (Z-CHO, 0.24±0.05 g·kg<sup>- 1</sup>) carbohydrates. Another TTE was performed 24 h later. Each energy system contribution was assessed. Generalized linear mixed models were used for statistical analysis (p<0.05). H-CHO increased relative anaerobic capacity (slope effect [baseline -intervention]x[H-CHO - M-CHO]) due to the relative lactic contribution maintenance (slope effect [baseline - intervention]x[H-CHO - Z-CHO] or [H-CHO - M-CHO]) and increase in relative alactic contribution (6.3±3.5 kJ·min<sup>- 1</sup>). The aerobic contribution was lower (- 8.7±4.0 kJ·min<sup>- 1</sup>), decreasing performance (- 34±16 s) for H-CHO. M-CHO and Z-CHO maintained anaerobic capacity due to increase in alactic contribution (slope effect [fasting - intervention]x[M-CHO - H-CHO]; and Z-CHO was 7.3±3.4 kJ·min<sup>- 1</sup> higher than baseline). Fasting increased relative alactic (2.9±1.7 kJ·min<sup>- 1</sup>) but decreased aerobic contribution (- 3.3±2.3 kJ·min<sup>- 1</sup>), impairing performance (- 17±12 s). In conclusion, MAOD<sub>alt</sub> can detect changes in energy system supply in different nutritional states. Therefore, participant's nutritional state must be considered prior to conducting the test.</p>","PeriodicalId":14439,"journal":{"name":"International journal of sports medicine","volume":" ","pages":"79-89"},"PeriodicalIF":2.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141758707","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}
Ryoichi Ema, Yuta Iino, Yuta Nomura, Tomoki Furusawa, Kosuke Hirata, Yasuhide Yoshitake, Ryota Akagi
{"title":"Instrument-assisted soft tissue mobilization in healthy adults acutely changes the tissue stiffness.","authors":"Ryoichi Ema, Yuta Iino, Yuta Nomura, Tomoki Furusawa, Kosuke Hirata, Yasuhide Yoshitake, Ryota Akagi","doi":"10.1055/a-2453-8631","DOIUrl":"10.1055/a-2453-8631","url":null,"abstract":"<p><p>This study clarified whether instrument-assisted soft tissue mobilization (IASTM) on the plantar surface changes abductor hallucis and plantar fascia stiffness at rest and medial longitudinal arch height under low- and high-loading conditions. IASTM was performed to one foot of the twenty-eight young men (IASTM condition), and the other foot of them was assigned to the control condition. Using ultrasonography, the resting shear wave propagation velocity of the abductor hallucis and plantar fascia and navicular height in a seated posture were determined. The foot contact area during quiet standing was measured using a foot-scan system. The shear wave propagation velocity of the plantar fascia significantly decreased by 10.8% in the IASTM condition but did not change significantly in the control condition. The magnitude of change in the shear wave propagation velocity of the plantar fascia was negatively correlated (r=- 0.660) with the shear wave propagation velocity of the plantar fascia before IASTM. The interaction of time and condition was not significant for the shear wave propagation velocity of the abductor hallucis, navicular height, or foot contact area. The current study revealed that IASTM on the plantar surface affected tissue stiffness but did not change the structure of the foot.</p>","PeriodicalId":14439,"journal":{"name":"International journal of sports medicine","volume":" ","pages":"137-143"},"PeriodicalIF":2.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11793953/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142681803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Vinicius Ribeiro Dos Anjos, Lavínia Vivan, Paulo Engelke, Claudio André Barbosa de Lira, Rodrigo Luiz Vancini, Katja Weiss, Thomas Rosemann, Beat Knechtle, Marília Dos Santos Andrade
{"title":"Differences in 5-km running pace between female and male triathletes.","authors":"Vinicius Ribeiro Dos Anjos, Lavínia Vivan, Paulo Engelke, Claudio André Barbosa de Lira, Rodrigo Luiz Vancini, Katja Weiss, Thomas Rosemann, Beat Knechtle, Marília Dos Santos Andrade","doi":"10.1055/a-2443-9921","DOIUrl":"10.1055/a-2443-9921","url":null,"abstract":"<p><p>During an IRONMAN, the pacing strategy in the running segment differs significantly between sexes. However, it is unknown if sex affects the running pace in shorter triathlon events. This study compared the pacing strategy between sexes during a 5-km running test performed following a 20-km cycle (sprint triathlon distances). Participants included 16 men (34.7±7.5 years) and 16 women (39.5±7.7 years). A cardiopulmonary exercise test to measure maximal oxygen uptake (˙VO<sup>2</sup>max) and a functional threshold power (FTP) were performed. Body composition was measured using a dual-emission X-ray absorptiometry system. Participants cycled at 90% FTP for 20 km and ran as fast as possible for 5 km. The total time spent cycling 20 km was shorter (~11%) in male than in female athletes (p<0.001). Similarly, the time spent to run 5 km was shorter in male (~11%) than in female athletes (p=0.006). Male athletes performed the last 600 m of the 5km race significantly faster than the initial meters (p<0.05). Female athletes performed the 5-km race without pace variation (p>0.05). In conclusion, apart from the sex differences associated with performance in short-term triathlon events, the pacing strategy was also different.</p>","PeriodicalId":14439,"journal":{"name":"International journal of sports medicine","volume":" ","pages":"115-120"},"PeriodicalIF":2.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142604232","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}