Journal of Functional Morphology and Kinesiology最新文献

{"title":"Continental Assessment of Work-Related Musculoskeletal Disorders Prevalence Among Surgeons: Systematic Review and Meta-Analysis.","authors":"Philippe Gorce, Julien Jacquier-Bret","doi":"10.3390/jfmk10020221","DOIUrl":"10.3390/jfmk10020221","url":null,"abstract":"<p><p><b>Background</b>: Work-related musculoskeletal disorders (WMSDs) are very prevalent among surgeons worldwide. The aim was to investigate the overall and body area WMSD prevalence (proportion of surgeons suffering from WMSD during their practice) by continent throughout a systematic review and meta-analysis. <b>Methods</b>: Three open databases were scanned without a date limit until 31 December 2024 to select relevant studies. The results were reported according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. <b>Results</b>: Among the 20,486 items, 68 articles with a total of 17,188 surgeons were included, distributed as follows: 36 studies in America, 15 in Asia, 16 in Europe, and 1 in Oceania. Overall prevalence was 77.6% in Asia (95% CI: 67.3-87.9%), 73.1% in Europe (95% CI: 60.3-86.0%), and 62.8% in America (95% CI: 57.0-68.6%). The most exposed areas were the neck, upper and lower back, and shoulder, with prevalence ranging from 30 to 50%. The ranking differed according to continent. In America, neck/shoulder WMSD and overall prevalence were negatively correlated to years of experience (r² = 0.182 and r² = 0.240, <i>p</i> < 0.05) and to the number of cases treated per week prevalence (r² = 0.794, <i>p</i> < 0.05), respectively. A positive correlation was observed between the elbow WMSD prevalence and age (r² = 0.365, <i>p</i> < 0.05). In Europe, a negative correlation was highlighted between the overall WMSD prevalence and age (r² = 0.599, <i>p</i> < 0.05). Another positive correlation was identified between shoulder WMSD prevalence and years of experience (r² = 0.735, <i>p</i> < 0.05). <b>Conclusions</b>: To improve surgeons' quality of work life, further research is needed to develop ergonomic programs, organizational work strategies, and assistive devices.</p>","PeriodicalId":16052,"journal":{"name":"Journal of Functional Morphology and Kinesiology","volume":"10 2","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12194797/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144497255","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Concurrent Validity and Reliability of Two Mobile Phone Applications for Measuring Vertical Jumps in Amateur Handball Players.","authors":"Amândio Dias, Alexandre Coutan, Bruno Silva, Catarina Eufrásio, Maria Teixeira, Mariana Alberto","doi":"10.3390/jfmk10020223","DOIUrl":"10.3390/jfmk10020223","url":null,"abstract":"<p><strong>Objectives: </strong>This study compares My Jump Lab and VertVision apps for measuring vertical jump height in handball players, assessing their validity and reliability. The research assesses both apps' accuracy, particularly concerning higher jumps, where errors have been noted, aiming to determine the most reliable tool. The goal is to provide a direct comparison between apps, as well as confirm the apps' validity and reliability for handball players.</p><p><strong>Methods: </strong>The present research is a transversal observational study. Twenty-seven amateur athletes performed five jumps on a contact mat with simultaneous recording by a smartphone with a high-speed camera. Pearson's r, ICC, SEM, CV, and Bland-Altman plots were used to evaluate discrepancies and determine accuracy.</p><p><strong>Results: </strong>Pearson correlation showed strong relationships, with ICC values between 0.993 and 0.998. Both apps overestimated jump height by 1.86% compared to the platform. Bland-Altman plots indicated minimal differences between observers, confirming high validity and reliability for CMJ measurement. Both apps demonstrated very high concurrent validity (<i>r</i> > 0.9) and reliability, with ICC values near 1 and CV below 5%. My Jump Lab exhibited smaller inter-observer differences, indicating greater consistency.</p><p><strong>Conclusions: </strong>The ease of use, affordability, and portability make both apps valuable for performance monitoring, training, and injury recovery. While both demonstrated good validity and reliability, My Jump Lab proved more consistent in jump comparisons. These tools extend beyond sports, supporting physiotherapy assessments and athletic training across diverse populations.</p>","PeriodicalId":16052,"journal":{"name":"Journal of Functional Morphology and Kinesiology","volume":"10 2","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12194570/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144497254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Changes in Body Composition and Body Image Perception in Adolescent Soccer Players Examined with Repeated Measurements During Pre-Season and In-Season Training.","authors":"Luciana Zaccagni, Mattia Reggiani, Stefania Toselli, Emanuela Gualdi-Russo","doi":"10.3390/jfmk10020219","DOIUrl":"10.3390/jfmk10020219","url":null,"abstract":"<p><p><b>Objectives</b>: Adolescents' health is positively influenced by the performance of physical activity. Regarding soccer, a very popular sport, the aims of the study were to assess changes in body composition and body image of late adolescent players during pre- and in-season training periods, analyzing the relationships between dissatisfaction and body composition parameters. <b>Methods</b>: A sample of 16-19-year-old male soccer players was examined longitudinally by three surveys. The body composition was assessed by anthropometric method. Body image perception was evaluated using two different figural scales related to shape and muscularity. <b>Results</b>: During the period examined, fat-free mass increased, and changes in perceived and ideal figures occurred, showing a desire toward more robust and muscular figures. Body image dissatisfaction was generally low, with a decrease in muscle dissatisfaction during the period. Body composition parameters significantly predicted body image dissatisfaction. <b>Conclusions</b>: Our findings suggest anthropometric and body image perception changes during soccer training with improvements in body composition parameters and a decrease in musculature dissatisfaction. These results highlight the importance of incorporating physical and psychological monitoring into training programs to support the healthy development of athletes' body image and body composition.</p>","PeriodicalId":16052,"journal":{"name":"Journal of Functional Morphology and Kinesiology","volume":"10 2","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12194373/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144497250","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Passive Heat Stimuli as a Systemic Training in Elite Endurance Athletes: A New Strategy to Promote Greater Metabolic Flexibility.","authors":"Sergi Cinca-Morros, Martin Burtscher, Fernando Benito-Lopez, Jesús Álvarez-Herms","doi":"10.3390/jfmk10020220","DOIUrl":"10.3390/jfmk10020220","url":null,"abstract":"<p><p><b>Objectives:</b> The ability to efficiently regulate body temperature is crucial during endurance activities such as trail running, especially during competitive events in hot conditions. Over the past decade, passive hyperthermia exposure has grown significantly in popularity as a means of improving acclimatization and performance in hot environments. The present study aims to compare the physiological changes that occur in a group of professional athletes due to passive sauna exposure (80-90 °C) and their own response to maximal aerobic performance. <b>Methods:</b> Twelve professional trail runners (eight men and four women) were tested in three conditions: (i) baseline; (ii) before; and (iii) after (a) passive dry sauna exposure and (b) a maximal endurance test. In both cases, physiological parameters such as heart rate, tympanic temperature, arterial and muscle oxygen saturation, and blood concentrations of glucose, total cholesterol, high-density lipoprotein (HDL) and hemoglobin were measured. <b>Results:</b> Sauna exposure produced similar trends in cardiovascular and metabolic responses to those occurring during exercise, but at a much lower physiological level. Glucose and HDL levels were both significantly elevated (or tended to be so) after sauna and exercise (<i>p</i> < 0.03 and <i>p</i> < 0.01, respectively). Athletes who mobilized the sum of substrates (glucose and HDL) performed the exercise test faster (r = -0.76; <i>p</i> < 0.004). The response of arterial oxygen saturation (decreased) was similar during sauna and exercise, but opposite at the muscular level (increased during sauna and decreased during exercise). Additionally, inter-individual variability in responses was noted for most of the other parameters, suggesting the existence of 'responders' and 'non-responders' to thermal stimuli. <b>Conclusions</b>: The physiological responses of trained endurance athletes are moderately impacted by passive sauna use. However, individual changes could be correlated with endurance performance and optimizing individualization. Heat stimuli promote different physiological responses in terms of cardiac function, oxygen kinetics and substrate mobilization, albeit to a lesser extent than exercise. Greater substrate mobilization during maximal endurance exercise was found to be correlated with better performance. Further studies are needed to explore the concepts of metabolic flexibility, as described here, and how heat exposure may improve systemic health and performance.</p>","PeriodicalId":16052,"journal":{"name":"Journal of Functional Morphology and Kinesiology","volume":"10 2","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12194397/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144497283","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Aerobic and Anaerobic Metabolism During Monofin Swimming in Trained Breath-Hold Divers.","authors":"Ivan Drviš, Dario Vrdoljak, Goran Dujić, Nikola Foretić, Željko Dujić","doi":"10.3390/jfmk10020218","DOIUrl":"10.3390/jfmk10020218","url":null,"abstract":"<p><p><b>Background:</b> This study aimed to examine the difference in blood lactate and oxygen saturation between monofin swimming with respiration and with breath-hold diving. The second aim was to investigate the difference between elite and intermediate breath hold-divers. <b>Methods:</b> This study included 15 freediving athletes (five females). Their chronological age was 25.9 ± 2.9 years, body mass 75.5 ± 11.9 kg, and height 180.2 ± 8.9 cm. The sample of variables included anthropometric indices, blood lactate, and oxygen saturation. The participants were measured during 100 m monofin horizontal swimming with respiration and breath-hold diving. Descriptive and inferential statistics were measured. The Kolmogorov-Smirnov (K-S) test was used to determine the normality of distribution. To determine the differences between the groups of participants, the <i>t</i>-test was used to determine the differences in anthropometric indices. Furthermore, to observe the differences between repeated measures, ANOVA with Fischer LSD test was used. Following that, the two-factor ANOVA analysis group (respiration/apnea) and group (intermediate/elite level)) was performed to determine the possible differences between groups in both conditions. Also, Cohen's effect size was calculated to quantify the differences among the measurements. <b>Results:</b> The results show that the divers perceive significantly smaller levels of lactates during dives with respiration (intermediate, 2.44 ± 0.64 mmol/L; elite, 2.23 ± 0.34 mmol/L) than during apnea (intermediate, 6.06 ± 2.00 mmol/L; elite, 4.10 ± 0.66 mmol/L). Furthermore, intermediate freedivers tend to perceive significantly higher values. <b>Conclusions:</b> To conclude, it can be noted that apnea monofin diving elicits significantly higher lactate production in comparison with distance-matched swimming. Such findings imply the anaerobic nature of breath-holding diving. Apart from that, elite divers tend to show a lower accumulation of lactate. Such findings imply that elite-level divers can endure prolonged apneas with lower anaerobic metabolism use.</p>","PeriodicalId":16052,"journal":{"name":"Journal of Functional Morphology and Kinesiology","volume":"10 2","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12193788/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144497238","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Special Issue \"Health and Performance Through Sports at All Ages 3.0\".","authors":"Gianpiero Greco","doi":"10.3390/jfmk10020217","DOIUrl":"10.3390/jfmk10020217","url":null,"abstract":"<p><p>In recent years, the growing attention of the scientific community on the benefits of sport and physical activity for health and performance has generated a significant body of research [...].</p>","PeriodicalId":16052,"journal":{"name":"Journal of Functional Morphology and Kinesiology","volume":"10 2","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12194771/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144497299","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Three Reasons for Playing the Tennis Forehand in Square Stance.","authors":"Lucio Caprioli, Francesca Campoli, Cristian Romagnoli, Ida Cariati, Saeid Edriss, Elvira Padua, Vincenzo Bonaiuto, Giuseppe Annino","doi":"10.3390/jfmk10020215","DOIUrl":"10.3390/jfmk10020215","url":null,"abstract":"<p><p>This study aims to compare the effectiveness of tennis forehand shots played by competitive athletes in open and square stances in terms of performance: (1) ball speed, (2) accuracy, and (3) gesture economy. This is with the aim of preventing the excessive wear and tear of the athlete's musculoskeletal structures.</p><p><strong>Methods: </strong>Between October 2024 and January 2025, forty-two healthy players were involved in the study. Eighty forehands were played by each subject with open and square stances in lateral and diagonal-inside running structured situations. The ball's speed, shot accuracy, and the athlete's heart rate were acquired. Kruskal-Wallis's and Dunn post hoc tests were used to compare the effect of stance, tactical situation, gender, and player's flexibility on these performance variables. The Wilcoxon signed-rank <i>t</i>-test was applied to compare each of the two types of stances.</p><p><strong>Results: </strong>Square stance consistently resulted in significantly higher ball speeds in both lateral running (Δ_Median: 6 km/h) and diagonal-inside running (Δ_Median: 4 km/h), while the differences in accuracy and metabolic demand were not significant overall.</p><p><strong>Conclusions: </strong>This study found that the square stance technique provides a clear advantage in terms of ball speed. Although the higher accuracy found was not significant, the small difference in metabolic effort was. Overall, the benefits reported seem to make the square stance the preferable choice.</p>","PeriodicalId":16052,"journal":{"name":"Journal of Functional Morphology and Kinesiology","volume":"10 2","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12194768/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144497307","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Is the FIFA 11+ Warm-Up Effective for Inducing Acute Knee Adaptations in Recreational Soccer Players?","authors":"Patricia Caudet, Ernest Baiget, Abraham Batalla, Joshua Colomar, Miguel Crespo, Rafael Martínez-Gallego, Francisco Corbi","doi":"10.3390/jfmk10020216","DOIUrl":"10.3390/jfmk10020216","url":null,"abstract":"<p><p><b>Objectives:</b> Soccer is the most practiced sport around the world. The injury incidence has an estimated rate of up to 70 injuries per 1000 h of play. FIFA 11+ is a program designed to prevent injuries and optimize performance. The purpose of this study was to analyze the acute effects of this program as a warm-up on different functional, physiological, and mechanical properties of various knee tissues and whether there were differences between genders. <b>Methods</b>: The sample included 45 recreational soccer players. Several muscular and tendon mechanical properties, muscular oxygen saturation, electromyography, maximum voluntary contraction, and rate of force development were analyzed, before and after performing the FIFA 11+. <b>Results</b>: Only a moderate significant increase in muscle oxygen saturation in men from pre- to post-test was reported. No other parameters showed statistically significant differences between groups, suggesting that the intervention may lack clinical relevance. The reported effect sizes were mostly trivial, so differences are unlikely to have significant practical relevance. Statistical analyses were performed using a 2 × 2 factorial repeated measures factorial ANOVA with Bonferroni post hoc comparisons. <b>Conclusions</b>: FIFA 11+ warm-up does not provide a sufficient stimulus to elicit mechanical or metabolic responses in the per-knee structures. Other warm-up designs may be more appropriate for finding these effects.</p>","PeriodicalId":16052,"journal":{"name":"Journal of Functional Morphology and Kinesiology","volume":"10 2","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12194256/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144497192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparative Study in Physical Fitness in Recreative Young Padel Players.","authors":"Ana Pereira, Luis Leitão, Diogo L Marques, Daniel A Marinho, Henrique P Neiva","doi":"10.3390/jfmk10020214","DOIUrl":"10.3390/jfmk10020214","url":null,"abstract":"<p><p><b>Background:</b> In recent years, padel-based interventions have been widely applied in junior and elite players of both genders concerning athletic performance, whereas evidence of their efficacy in trials that use simple randomization has not been well established. This study aimed to compare the effects of 8 weeks of padel training (PD) on the strength and power of untrained healthy children. <b>Methods:</b> Twenty-five children aged 11-15 years (12.36 ± 1.15 years) were randomly assigned into experimental (PD) (nine boys and five girls: 1.58 ± 0.04 m; 50.00 ± 6.75 kg; and 19.96 ± 1.95 kg/m²) and control (CT) (seven boys and four girls: 1.60 ± 0.05 m; 56.92 ± 2.75 kg; and 21.61 ± 1.02 kg/m²) groups. The PD group trained twice a week for 8 weeks, and the CT group did not follow any training program and did not participate in regular exercise or sports. Countermovement jump, medicine ball throw, handgrip, and 5 m sprint test results were measured at baseline and after the intervention in the padel sport group. <b>Results:</b> The results showed a significant interaction for training-induced responses in the sprint test (T5) (F = 10.55, <i>p</i> = 0.004, η² = 0.31). No significant interactions were observed for handgrip strength (HG) (F = 3.90, p=0.06), the medicine ball throw (MBT) (F = 0.851, <i>p</i> = 0.37, η² = 0.04), and the countermovement jump (F = 1.04, <i>p</i> =0.32, η² = 0.04), with clear improvements from pre- to post-training in the PD group. After 8 weeks of training, the PD group showed increased performance in handgrip strength (<i>p</i> = 0.004), while the CT group had decreased velocity post-training (<i>p</i> = 0.011). <b>Conclusions:</b> The individual results in the PD group showed an improvement, which suggests that the practice of padel seems to be a good strategy for improving one's fitness. It is suggested that 8 weeks of PD seem to be effective in improving strength- and power-related variables in healthy, untrained children. This could be considered an alternative to traditional sports to improve the body fitness of young children and should be applied in school-based programs and the sports club community. Also, more high-quality RCTs are needed in the future.</p>","PeriodicalId":16052,"journal":{"name":"Journal of Functional Morphology and Kinesiology","volume":"10 2","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12193966/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144497252","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Repeated Sprint Performance and Inter-Limb Asymmetry in Elite Female Sprinters: A Study of Lactate Dynamics and Lower Limb Muscle Activity.","authors":"Artur Gołaś, Artur Terbalyan, Mariola Gepfert, Robert Roczniok, Aleskander Matusiński, Krzysztof Kotuła, Przemysław Pietraszewski, Adam Zając","doi":"10.3390/jfmk10020213","DOIUrl":"10.3390/jfmk10020213","url":null,"abstract":"<p><p><b>Background:</b> Repeated short maximal sprints induce high blood lactate concentrations and may influence neuromuscular coordination, but the relationship between lactate accumulation and inter-limb asymmetry in elite athletes remains unclear. <b>Objectives:</b> This study sought to investigate how blood lactate dynamics during repeated sprint efforts relate to sprint performance and inter-limb muscle asymmetry in elite female sprinters. <b>Methods:</b> Eight elite women (21.3 ± 5.4 y; 54.2 ± 5.1 kg; 165.4 ± 4.3 cm) performed four sets of five all-out 50 m sprints (1 min rest between reps; 5 min between sets). Sprint times were electronically timed. Capillary lactate was measured at rest and 1 min/4 min post-set. Quadricep, hamstring, and gluteal asymmetry was assessed via textile electromyography. Nonparametric statistics (Spearman's ρ, Friedman test) were applied. <b>Results:</b> From Set 1 to Set 4, sprint time fell from 7.25 ± 0.13 s to 7.07 ± 0.16 s (<i>p</i> = 0.044), 1 min lactate rose from 8.51 ± 2.65 to 15.60 ± 2.66 mmol/L (<i>p</i> < 0.001), and 4 min lactate from 7.16 ± 2.32 to 13.64 ± 2.76 mmol/L (<i>p</i> = 0.002). Muscle group asymmetries decreased (<i>p</i> < 0.01), with lactate at 1 min, correlating negatively with quadriceps (ρ = -0.59) and gluteal (ρ = -0.48) asymmetry. <b>Conclusions:</b> In elite female sprinters, progressive lactate accumulation during repeated 50 m bouts is linked to faster times and reduced muscle asymmetry, suggesting that lactate may enhance neuromuscular coordination under fatigue.</p>","PeriodicalId":16052,"journal":{"name":"Journal of Functional Morphology and Kinesiology","volume":"10 2","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12194348/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144497293","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}