Research quarterly for exercise and sport最新文献

{"title":"Clustered Lifestyle Profiles of Adolescent Football Players: Examining the Relationship Between Off-Training Lifestyle and Training Performance.","authors":"Nuno Mateus, Diogo Coutinho, Sara Santos, Bruno Gonçalves, Catarina Abrantes, Jaime Sampaio","doi":"10.1080/02701367.2025.2496268","DOIUrl":"https://doi.org/10.1080/02701367.2025.2496268","url":null,"abstract":"<p><p>This study clustered young male football players based on off-training physical activity (PA) and sedentary behavior (SB) to examine their impact on physical and technical-tactical performance in small-sided-games (SSG). In Stage 1, thirty-four adolescent male football players (mean age 14.2   ±   0.8 years) were monitored for one week using tri-axial accelerometers to quantify PA and SB levels. Participants were classified into two groups: Active (higher moderate-to-vigorous PA and lower SB) and Sedentary (higher SB and lower PA). In Stage 2, sixteen players, divided into four teams, participated in SSG. Two teams comprised players from the Active group (ACT) and two from the Sedentary group (SED). They competed under three conditions: I_{ACT<i>vs</i>ACT}; II_{ACT<i>vs</i>SED}; and III_{SED<i>vs</i>SED}. Cumming estimation plots illustrated that ACT players in I_{ACT<i>vs</i>ACT} covered greater total distance (d = -1.43), distances in jogging (d = -0.69), running (d = -1.33), and sprinting (d = -1.26), with higher player load (d = -1.28) and decelerations (d = -0.58), but lower walking distances (d = 0.79), successful shots (d = 0.87), passes (d = 1.17), and dribbles (d = 0.89) compared to other conditions.. SED players in III_SEDvsSED showed higher running distances (d = 0.76) and more decelerations (d = 0.7) but fewer passes. Bayesian ANOVA confirmed longer distances and more sprints in I_{ACT<i>vs</i>ACT} versus III_{SED<i>vs</i>SED}, with Bayes factors of 6.50 and 9.48, respectively. Clustering young players based on off-training PA and SB profiles affects SSG performance, with teams having lower PA and higher SB showing compromised physical and technical-tactical outcomes. Coaches can use this information to tailor training, enhance learning environments, and optimize player development.</p>","PeriodicalId":94191,"journal":{"name":"Research quarterly for exercise and sport","volume":" ","pages":"1-13"},"PeriodicalIF":0.0,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144040276","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ecological Network Analysis: Utilizing Machine Learning to Unravel the Effects of Multilevel Pathways of Moderate⁃to⁃Vigorous Physical Activity Facilitators Among School Children.","authors":"Yufei Qi, Fang Li, Yao Yin, Qian Lin, Sareena Hanim Hamzah, Wenzhi Peng","doi":"10.1080/02701367.2025.2478870","DOIUrl":"https://doi.org/10.1080/02701367.2025.2478870","url":null,"abstract":"<p><p>The objective of the present study was to ascertain whether the association between moderate-to-vigorous intensity physical activity (MVPA) levels and individual, interpersonal, organizational, and environmental factors among school children is influenced by their attitudes toward emerging sports participants (ESP). To this end, machine learning (ML) was employed to analyze the data. This cross-sectional study, involved 655 child-parent pairs in Changsha City to assess children's MVPA. Data were collected via self-administered questionnaires, evaluating MVPA levels and attitudes from children and caregivers. Various statistical models, including random forest and LASSO regression, were utilized for analysis. The study revealed that boys engaged in more MVPA than girls. Most participants liked ESP, with significant teacher support noted. Random forest and LASSO regression models identified key factors influencing MVPA, with notable variability among non-achievers. The gradient boosting machine and K-nearest neighbors models demonstrated similar predictive performance. The final model, comprising 37 parameters, indicated significant relationships between variables, particularly highlighting the importance of school offerings ESP and living near sports field. This study concludes that offering ESP in schools, along with positive modeling and encouragement from caregivers and peers, effectively enhances children's participation in MVPA. Living near sports field also positively impacts MVPA levels.</p>","PeriodicalId":94191,"journal":{"name":"Research quarterly for exercise and sport","volume":" ","pages":"1-13"},"PeriodicalIF":0.0,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144001140","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of a Secondary Cognitive Task on Psychological and Stretch Performance.","authors":"Jason Kostrna, Anamaria Astudillo, Elizabeth Perez","doi":"10.1080/02701367.2025.2496765","DOIUrl":"https://doi.org/10.1080/02701367.2025.2496765","url":null,"abstract":"<p><p>Extensive research supports the positive effects of stretching on joint flexibility. During stretching, an individual's perceptions of stretch-related discomfort and pain negatively influence affective response. This study examined the effects of a dissociative attentional strategy on performance and perception during stretching. To induce dissociation, participants completed a secondary cognitive task (mental math) during passive and active static stretching. Participants (n = 16) stretched in the following conditions: (1) active-mental math, (2) active-control, (3) passive-mental math, and (4) passive-control. Participants completed conditions in a block randomized order (i.e. Latin Square Design). MANOVA of range of motion (ROM) did not support an interaction of stretch and cognitive load condition or a main effect of cognitive load. However, there was a significant effect of stretch condition on pleasantness and a significant effect of cognitive load on perceived stretch intensity and pleasantness. Passive stretching resulted in a greater ROM, reduced perceived stretch intensity, and increased pleasantness compared to active stretching. The introduction of a secondary cognitive task resulted in no significant change to ROM, but did result in reduced perception of stretch intensity and increased pleasantness. Conclusion: These findings provide evidence that dissociation during static stretch can reduce perceived stretch intensity without reduction in ROM. This effect exists even during active stretching, with the added benefit of improved ROM.</p>","PeriodicalId":94191,"journal":{"name":"Research quarterly for exercise and sport","volume":" ","pages":"1-10"},"PeriodicalIF":0.0,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144040280","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Six Weeks' Isometric Strength Training Compared to Traditional Strength Training on Gains in Strength, Power, and Speed in Male Academy Soccer Players.","authors":"Luke S Bailey, Joe Phillips, George Farrell, Stephen J McQuilliam, Robert M Erskine","doi":"10.1080/02701367.2025.2488843","DOIUrl":"https://doi.org/10.1080/02701367.2025.2488843","url":null,"abstract":"<p><p><b>Purpose:</b> Elevated sport-specific physical demands and congested fixture schedules leave little recovery time and augment fatigue levels in soccer players. Compared to traditional strength training (TST), isometric strength training (IST) may elicit comparative improvements in strength and performance-related parameters in soccer players, while reducing fatigue during periods of elevated competitive loading. <b>Methods:</b> This study compared the effects of 6-weeks' IST and TST on gains in strength, power, and speed in male academy soccer players. Eighteen athletes from a Football Association League 2 club's academy (age: 17.2 ± 0.6 years, height: 1.79 ± 0.06 m, body mass: 71.6 ± 3.4 kg) were randomly assigned to either the IST (<i>n</i> = 9) or TST (<i>n</i> = 9) group. Baseline and post-training testing included trap bar squat one-repetition maximum (1-RM), isometric mid-thigh pull (IMTP), bilateral vertical countermovement jump (CMJ), and 10 m and 40 m linear sprints. Each group completed 12 training intervention sessions over six weeks, which comprised either an isometric or dynamic variation of a mid-thigh (clean) pull, split squat, and hip thrust. <b>Results:</b> Results indicated no group × time interaction effect on trap bar squat 1-RM (<i>p</i> = .171, η_p² = 0.107), IMTP peak force (<i>p</i> = .478, η_p² = 0.039), CMJ jump height (JH; <i>p</i> = .463, η_p² = 0.028), CMJ peak power (PP; <i>p</i> = .868, η_p² = 0.001), 10 m acceleration (<i>p</i> = .074, η_p² = 0.186), or sprint velocity (<i>p</i> = .348, η_p² = 0.058). However, there were main effects of time on trap bar squat 1-RM (<i>p</i> < .001, η_p² = 0.634), CMJ JH (<i>p</i> = .031, η_p² = 0.255) and sprint velocity (<i>p</i> = .012, η_p² = 0.324). <b>Conclusion:</b> In conclusion, IST is just as effective as TST in improving (or maintaining) strength, power, and speed during fixture-congested schedules in men's academy soccer.</p>","PeriodicalId":94191,"journal":{"name":"Research quarterly for exercise and sport","volume":" ","pages":"1-8"},"PeriodicalIF":0.0,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144052287","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Design and Validation of a Questionnaire for the Assessment of Tennis Players' Tactical Skills (TST).","authors":"Eneko Sanchez Mencia, Josep Campos-Rius, Erika Borrajo Mena","doi":"10.1080/02701367.2025.2488847","DOIUrl":"https://doi.org/10.1080/02701367.2025.2488847","url":null,"abstract":"<p><p>The aim of the present study was to develop and validate a self-assessment questionnaire for tactical skills in tennis. This is the first questionnaire to assess tactical skills in this discipline to our knowledge. The study sample consisted of 253 tennis players at the expert, intermediate, and beginner levels. The age of the tennis players ranged from 18 to 70 years. The results of the content analysis of the questionnaire revealed a three-factor structure, consisting of tactics used in training, tactics used in the match, and decision making in the match, with adequate psychometric properties. Analyses of variance were carried out to compare the results for these three tactical factors with the level of play (expert, intermediate, and beginner) and player profile (complete, serve-volley, offensive, and counter-attacking player). These results showed that expert players scored higher on all three factors. Furthermore, players with a complete profile had statistically higher scores across all three factors compared to serve-volley players. The results and their implications are then discussed.</p>","PeriodicalId":94191,"journal":{"name":"Research quarterly for exercise and sport","volume":" ","pages":"1-9"},"PeriodicalIF":0.0,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144015879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multiple Gender Stereotype Threats in Motor Performance and Learning.","authors":"Caroline Valente Heidrich, Priscila Cardozo, Suzete Chiviacowsky","doi":"10.1080/02701367.2025.2492183","DOIUrl":"https://doi.org/10.1080/02701367.2025.2492183","url":null,"abstract":"<p><p><b>Purpose</b>: Stereotype threat occurs when individuals from stereotyped groups fear confirming a negative stereotype, which undermines performance and learning. This study compared the effects of multiple gender stereotype threats (ST) on motor performance and learning of a soccer dribbling task. <b>Method</b>: One hundred women, with low domain identification (mean age = 27.1 years, SD = 7.0), twenty per group, were randomly assigned to four ST groups, considering the target (self or group) and the source (ingroup or outgroup) of the stereotype: ST/self-outgroup, ST/self-ingroup, ST/group-outgroup, ST/group-ingroup, and a nullified-stereotype threat group (NST). After the pretest (1 trial) and before practice (15 trials), the NST group was informed that no gender differences existed in the task, while the ST groups were told that men perform better in dribbling. Participants in the self or group as targets conditions were respectively informed that their individual performance or the performance of women as a group would be evaluated. The outgroup as source groups were assessed by male players, and the ingroup as source groups by female players. Retention and transfer (adding a cone) tests (5 trials each) were conducted next day. Perceived self-efficacy and stereotype endorsement were also examined. <b>Results</b>: The NST group outperformed the ST groups at all phases of the experiment, with no differences between the ST conditions. Also, the participants endorsed the negative stereotype, and self-efficacy was lower in the self/in and group/out groups. <b>Conclusion</b>: The multiple gender stereotype threats equally impair motor performance and learning among women with low domain identification.</p>","PeriodicalId":94191,"journal":{"name":"Research quarterly for exercise and sport","volume":" ","pages":"1-9"},"PeriodicalIF":0.0,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144050718","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Climbing Movement Repertoire in Olympic Bouldering: Exploring Its Role in Decision-Making, Performance, and Time Constraint Management.","authors":"Jerry Prosper Medernach, Julian Henz, Daniel Memmert, Xavier Sanchez","doi":"10.1080/02701367.2025.2485188","DOIUrl":"https://doi.org/10.1080/02701367.2025.2485188","url":null,"abstract":"<p><p>In Olympic bouldering, climbers must solve a series of boulders, which are short routes set on low-height climbing walls. Time constraints imposed by competition regulations limit the time available for strategic decisions and climbing attempts. An extensive climbing movement repertoire helps climbers to identify meaningful movement patterns and anticipate climbing solutions. Expert routesetters-those climbers responsible for setting boulders-have been described to possess an extensive climbing movement repertoire. This study explored the role of the movement repertoire as an underlying cognitive system in decision-making, climbing performance, and time constraint management in Olympic bouldering. A total of 48 elite climbers-including 24 climbers with professional routesetting expertise (RS) and 24 climbers without any routesetting expertise (NR)-were tasked with climbing two boulders under varying time constraints (B1: four minutes; B2: two minutes). Data collected included non-stored climbing movements, strategic decision-making, and performance-related variables. In both boulders, the RS group had fewer non-stored climbing movements, showed enhanced decision-making skills (shorter previewing times, more effective climbing solutions, fewer strategic adjustments), and achieved better climbing performances (higher top rates, fewer attempts, higher holds in best attempts). Furthermore, in B2, the RS group was less perturbed by increased time constraints, showing a smaller decline in non-stored climbing movements, strategic decision-making, and climbing performance compared to the NR group. Routesetting expertise appears to be a relevant performance parameter in climbing. Climbers with such expertise benefit from their extensive movement repertoire to make efficient decisions, optimize performance, and effectively manage time constraints.</p>","PeriodicalId":94191,"journal":{"name":"Research quarterly for exercise and sport","volume":" ","pages":"1-12"},"PeriodicalIF":0.0,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144046889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Role of Maximum and Explosive Strength in the Relationship Between the Expanded Disability Status Scale (EDSS) and Functional Capacity in People with Multiple Sclerosis: A Mediation Analysis.","authors":"Luis Andreu-Caravaca, Domingo J Ramos-Campo, José Moncada-Jiménez, Jacobo Á Rubio-Arias","doi":"10.1080/02701367.2025.2490165","DOIUrl":"https://doi.org/10.1080/02701367.2025.2490165","url":null,"abstract":"<p><p>The relationship between functional capacity and disability status in individuals with Multiple Sclerosis (MS) is well established. However, to date, the interference of lower limb strength in this classic correlation has not been studied. Therefore, this study aimed to investigate the mediating role of muscle lower limb strength variables, including maximum strength (MVIC) and explosive strength (RFD), in the relationship between the disability status, measured by Expanded Disability Status Scale (EDSS), and functional test outcomes in a MS sample. A total of 49 patients performed 4 functional tests: timed up-and-go test (TUG), sit-to-stand (STS), 10-meter walk test (10MWT), and 6-minute walk test (6MWT), as well as the measurement of MVIC and RFD. A statistical mediation analysis was conducted to examine the influence of maximum and explosive strength on the relationship between EDSS and functional capacity. Regarding MVIC, the effect of EDSS on the 6MWT (indirect effect = 48%, <i>p</i> = .013), 10MWT (indirect effect = 18.1%, <i>p</i> = .015) and TUG test (indirect effect = 27.2%, <i>p</i> = .003) decreased. Regarding RFD late (0-200), the effect of EDSS on the 6MWT (indirect effect = 34.8% <i>p</i> = .0048), 10MWT (indirect effect = 18.0%, <i>p</i> = .021) and TUG test (indirect effect = 25.0%, <i>p</i> = .014) decreased. MVIC and RFD late variables play a significant role and influence the relationship between the EDSS and functional capacity.</p>","PeriodicalId":94191,"journal":{"name":"Research quarterly for exercise and sport","volume":" ","pages":"1-8"},"PeriodicalIF":0.0,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144028443","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"VLa_max Correlates Strongly With Glycolytic Performance.","authors":"Boris Clark, Paul W Macdermid","doi":"10.1080/02701367.2025.2481176","DOIUrl":"https://doi.org/10.1080/02701367.2025.2481176","url":null,"abstract":"&lt;p&gt;&lt;p&gt;&lt;math&gt;&lt;mrow&gt;&lt;mover&gt;&lt;mrow&gt;&lt;mtext&gt; &lt;/mtext&gt;&lt;mi&gt;V&lt;/mi&gt;&lt;/mrow&gt;&lt;mo&gt;˙&lt;/mo&gt;&lt;/mover&gt;&lt;/mrow&gt;&lt;mi&gt;L&lt;/mi&gt;&lt;mrow&gt;&lt;msub&gt;&lt;mi&gt;a&lt;/mi&gt;&lt;mrow&gt;&lt;mo&gt;max&lt;/mo&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/mrow&gt;&lt;/math&gt; estimates an athlete's maximal-glycolytic rate. This study aimed to determine the relationships between the &lt;math&gt;&lt;mrow&gt;&lt;mover&gt;&lt;mrow&gt;&lt;mtext&gt; &lt;/mtext&gt;&lt;mi&gt;V&lt;/mi&gt;&lt;/mrow&gt;&lt;mo&gt;˙&lt;/mo&gt;&lt;/mover&gt;&lt;/mrow&gt;&lt;mi&gt;L&lt;/mi&gt;&lt;mrow&gt;&lt;msub&gt;&lt;mi&gt;a&lt;/mi&gt;&lt;mrow&gt;&lt;mo&gt;max&lt;/mo&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/mrow&gt;&lt;/math&gt; and cycle ergometry efforts with a high-glycolytic energy contribution and the influence of &lt;math&gt;&lt;mrow&gt;&lt;mover&gt;&lt;mrow&gt;&lt;mtext&gt; &lt;/mtext&gt;&lt;mi&gt;V&lt;/mi&gt;&lt;/mrow&gt;&lt;mo&gt;˙&lt;/mo&gt;&lt;/mover&gt;&lt;/mrow&gt;&lt;mi&gt;L&lt;/mi&gt;&lt;mrow&gt;&lt;msub&gt;&lt;mi&gt;a&lt;/mi&gt;&lt;mrow&gt;&lt;mo&gt;max&lt;/mo&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/mrow&gt;&lt;/math&gt; and &lt;math&gt;&lt;mrow&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;VO&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;mi&gt;max&lt;/mi&gt;&lt;/mrow&gt;&lt;/mrow&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/mrow&gt;&lt;/math&gt; on respiratory compensation point. Eleven national-international endurance cyclists (&lt;math&gt;&lt;mrow&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;VO&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;mi&gt;max&lt;/mi&gt;&lt;/mrow&gt;&lt;/mrow&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/mrow&gt;&lt;/math&gt; = 70.7 ± 5.9 ml·kg&lt;sup&gt;-1&lt;/sup&gt;·min&lt;sup&gt;-1&lt;/sup&gt;) completed a 15-s isokinetic-test with pre- and postlactate measurements to determine &lt;math&gt;&lt;mrow&gt;&lt;mover&gt;&lt;mrow&gt;&lt;mtext&gt; &lt;/mtext&gt;&lt;mi&gt;V&lt;/mi&gt;&lt;/mrow&gt;&lt;mo&gt;˙&lt;/mo&gt;&lt;/mover&gt;&lt;/mrow&gt;&lt;mi&gt;L&lt;/mi&gt;&lt;mrow&gt;&lt;msub&gt;&lt;mi&gt;a&lt;/mi&gt;&lt;mrow&gt;&lt;mo&gt;max&lt;/mo&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/mrow&gt;&lt;/math&gt;, a 1-min maximal effort, and a ramp test to exhaustion in a single test session. The main findings showed strong relationships between &lt;math&gt;&lt;mrow&gt;&lt;mover&gt;&lt;mrow&gt;&lt;mtext&gt; &lt;/mtext&gt;&lt;mi&gt;V&lt;/mi&gt;&lt;/mrow&gt;&lt;mo&gt;˙&lt;/mo&gt;&lt;/mover&gt;&lt;/mrow&gt;&lt;mi&gt;L&lt;/mi&gt;&lt;mrow&gt;&lt;msub&gt;&lt;mi&gt;a&lt;/mi&gt;&lt;mrow&gt;&lt;mo&gt;max&lt;/mo&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/mrow&gt;&lt;/math&gt; and the mean absolute (&lt;i&gt;r&lt;/i&gt; = 0.83, &lt;i&gt;p&lt;/i&gt; = .002) and relative (&lt;i&gt;r&lt;/i&gt; = 0.88, &lt;i&gt;p&lt;/i&gt; = .0004) power during the lactic interval of the 15-s isokinetic-test. This relationship weakened when comparing &lt;math&gt;&lt;mrow&gt;&lt;mover&gt;&lt;mrow&gt;&lt;mtext&gt; &lt;/mtext&gt;&lt;mi&gt;V&lt;/mi&gt;&lt;/mrow&gt;&lt;mo&gt;˙&lt;/mo&gt;&lt;/mover&gt;&lt;/mrow&gt;&lt;mi&gt;L&lt;/mi&gt;&lt;mrow&gt;&lt;msub&gt;&lt;mi&gt;a&lt;/mi&gt;&lt;mrow&gt;&lt;mo&gt;max&lt;/mo&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/mrow&gt;&lt;/math&gt; with mean absolute (&lt;i&gt;r&lt;/i&gt; = 0.52, &lt;i&gt;p&lt;/i&gt; = .098) and relative (&lt;i&gt;r&lt;/i&gt; = 0.29, &lt;i&gt;p&lt;/i&gt; = .393) power during a 1-min maximal effort. Combining the &lt;math&gt;&lt;mrow&gt;&lt;mover&gt;&lt;mrow&gt;&lt;mtext&gt; &lt;/mtext&gt;&lt;mi&gt;V&lt;/mi&gt;&lt;/mrow&gt;&lt;mo&gt;˙&lt;/mo&gt;&lt;/mover&gt;&lt;/mrow&gt;&lt;mi&gt;L&lt;/mi&gt;&lt;mrow&gt;&lt;msub&gt;&lt;mi&gt;a&lt;/mi&gt;&lt;mrow&gt;&lt;mo&gt;max&lt;/mo&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/mrow&gt;&lt;/math&gt; and &lt;math&gt;&lt;mrow&gt;&lt;mover&gt;&lt;mrow&gt;&lt;mtext&gt; &lt;/mtext&gt;&lt;mi&gt;V&lt;/mi&gt;&lt;/mrow&gt;&lt;mo&gt;˙&lt;/mo&gt;&lt;/mover&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mrow&gt;&lt;mi&gt;O&lt;/mi&gt;&lt;/mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;mo&gt;max&lt;/mo&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/mrow&gt;&lt;/math&gt; data through multiple regression resulted in a positive effect on the estimation of respiratory compensation point. It was concluded that the &lt;math&gt;&lt;mrow&gt;&lt;mover&gt;&lt;mrow&gt;&lt;mtext&gt; &lt;/mtext&gt;&lt;mi&gt;V&lt;/mi&gt;&lt;/mrow&gt;&lt;mo&gt;˙&lt;/mo&gt;&lt;/mover&gt;&lt;/mrow&gt;&lt;mi&gt;L&lt;/mi&gt;&lt;mrow&gt;&lt;msub&gt;&lt;mi&gt;a&lt;/mi&gt;&lt;mrow&gt;&lt;mo&gt;max&lt;/mo&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/mrow&gt;&lt;/math&gt; is a relevant indicator of maximal glycolytic rate. However, this metric currently lacks scientific validation as an accurate estimate of glycolytic rate and provides minimal extra information","PeriodicalId":94191,"journal":{"name":"Research quarterly for exercise and sport","volume":" ","pages":"1-8"},"PeriodicalIF":0.0,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144060802","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Skeletal Muscle Resaturation Relates to Aerobic Fitness in Adults Participating in Strength and Aerobic Exercises.","authors":"Kase J Pennartz, Michael R Perlet, Genevieve B Batman, Kyndall V Ransom, Joshua L Keller","doi":"10.1080/02701367.2025.2482108","DOIUrl":"https://doi.org/10.1080/02701367.2025.2482108","url":null,"abstract":"<p><p><b>Purpose</b>: This study examined differences in metrics of skeletal muscle re-saturation between strength and aerobically oriented individuals and potential relations between re-saturation and aerobic fitness. <b>Methods</b>: Forty-nine healthy young adult men and women completed body composition analysis, a maximal lower-body strength assessment, a maximal aerobic fitness (<math><mrow><mover><mtext>V</mtext><mo>.</mo></mover><msub><mtext>O</mtext><mrow><mn>2</mn><mi>max</mi></mrow></msub></mrow></math>) test, and a near-infrared spectroscopy vascular occlusion test (NIRS+VOT). Skeletal muscle tissue oxygenation (StO₂), oxygenated hemoglobin (O₂Hb), and deoxygenated (HHb) hemoglobin were collected from a NIRS device attached to the vastus lateralis. Re-saturation measures (e.g. upslope, re-saturation max, and hypersaturation area under the curve (AUC)) were derived from the reperfusion phase of the NIRS+VOT. <b>Results</b>: All O₂Hb and StO₂ re-saturation metrics, particularly upslope (<i>r</i> = 0.622 and <i>r</i> = -.613, respectively), were significantly (<i>p</i> < .05) related to <math><mrow><mover><mtext>V</mtext><mo>.</mo></mover><msub><mtext>O</mtext><mrow><mn>2</mn><mi>max</mi></mrow></msub></mrow></math>. In the strength group, O₂Hb and HHb upslope (<i>r</i> = 0.584; <i>p</i> < .001; <i>r</i> = -.550; <i>p</i> = .001, respectively) and re-saturation max (<i>r</i> = 0.372; <i>p</i> = .036; <i>r</i> = .562, <i>p</i> < .001, respectively) were significantly related to <math><mrow><mover><mtext>V</mtext><mo>.</mo></mover><msub><mtext>O</mtext><mrow><mn>2</mn><mi>max</mi></mrow></msub></mrow></math>. For the aerobic group, O₂Hb upslope (<i>r</i> = .486; <i>p</i> = .048), re-saturation max (<i>r</i> = 0.535; <i>p</i> = .027), and hypersaturation AUC (<i>r</i> = 0.564; <i>p</i> = .018) were significantly related to <math><mrow><mover><mtext>V</mtext><mo>.</mo></mover><msub><mtext>O</mtext><mrow><mn>2</mn><mi>max</mi></mrow></msub></mrow></math>. The aerobic group had significantly (<i>p</i> = .011; BF₁₀ = 8.043) greater O₂Hb upslope (1.6 ± .789 vs. 1.1 ± .474 A.U.s^-1) and (<i>p</i> = .027; BF₁₀ = 2.929) hypersaturation AUC (1158.3 ± 545.02 vs. 860.4 ± 365.35 A.U.s^-1) than the strength group. <b>Conclusion</b>: Upslope was the most related to <math><mrow><mover><mtext>V</mtext><mo>.</mo></mover><msub><mtext>O</mtext><mrow><mn>2</mn><mi>max</mi></mrow></msub></mrow></math> in strength and aerobically oriented adults. Interestingly, O₂Hb re-saturation max may not be sensitive to differences between routine strength and aerobic exercise and may reflect shared underlying physiological mechanisms of the predominant fitness orientation.</p>","PeriodicalId":94191,"journal":{"name":"Research quarterly for exercise and sport","volume":" ","pages":"1-9"},"PeriodicalIF":0.0,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144061729","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}