International journal of sport nutrition and exercise metabolism最新文献

{"title":"Collagen Supplementation Augments Strength Training-Induced Gains in Tendon Size and Rate of Force Development in Elite Female Master Field Hockey Athletes.","authors":"Christopher D Nulty, Robert M Erskine","doi":"10.1123/ijsnem.2025-0089","DOIUrl":"https://doi.org/10.1123/ijsnem.2025-0089","url":null,"abstract":"<p><p>We investigated the effects of 8-weeks of eccentric resistance exercise (RE) with hydrolyzed collagen supplementation on patellar tendon (PT) cross-sectional area (CSA), vastus lateralis (VL) muscle size, maximum voluntary force  (MVF), and peak rate of force development (pRFD) in international female field hockey Master athletes. Twenty-two premenopausal women (37 ± 2 years, 68.9 ± 8.0 kg, and 1.68 ± 0.04 m) were randomly assigned to collagen (COL; n = 10) and placebo (PLA; n = 12) cohorts in a triple-blind design. They completed three eccentric RE sessions per week for 8 weeks in addition to their regular hockey training. Before each RE session, participants ingested 30 g hydrolyzed COL or 32.9 g maltodextrin (PLA), together with 500 mg vitamin C. Pre- and postintervention, we assessed MVF and pRFD during a voluntary multijoint isometric muscle contraction and countermovement jump height, and VL thickness and PT CSA were measured with ultrasonography. MVF increased from 892 ± 366 to 1,011 ± 420 N (p = .020) and VL thickness increased from 21 ± 3 to 22 ± 3 mm (p = .015), with no Group × Time interactions (p > .05), whereas countermovement jump height did not change (p = .238). PT CSA increased in both groups (p < .001) but more in COL (116 ± 12 to 121 ± 13 mm2) than PLA (109 ± 22 to 111 ± 22 mm2, p = .014). Similarly, pRFD increased in both groups (p = .002) but more in COL (7.9 ± 1.3 to 10.1 ± 2.4 kN/s) than PLA (8.2 ± 2.4 to 9.6 ± 2.9 kN/s, p = .039). Therefore, hydrolyzed collagen supplementation enhanced gains in PT CSA and pRFD following 8 weeks of eccentric RE in elite female field hockey Master athletes, thus providing an effective strategy to improve physical performance in this underresearched population.</p>","PeriodicalId":14334,"journal":{"name":"International journal of sport nutrition and exercise metabolism","volume":" ","pages":"1-10"},"PeriodicalIF":2.6,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145137647","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Erratum. Ingesting a 12% Carbohydrate-Electrolyte Beverage Before Each Half of a Soccer Match Simulation Facilitates Retention of Passing Performance and Improves High-Intensity Running Capacity in Academy Players.","authors":"","doi":"10.1123/ijsnem.2025-0174","DOIUrl":"https://doi.org/10.1123/ijsnem.2025-0174","url":null,"abstract":"","PeriodicalId":14334,"journal":{"name":"International journal of sport nutrition and exercise metabolism","volume":" ","pages":"1"},"PeriodicalIF":2.6,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145080594","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nutritionally Relevant Technological Advancements in Professional Cycling.","authors":"Javier T Gonzalez, Simon Helleputte, Teun van Erp, Daniel Green, Tim Podlogar, Wim Derave, Asker Jeukendrup, Louise M Burke","doi":"10.1123/ijsnem.2025-0048","DOIUrl":"https://doi.org/10.1123/ijsnem.2025-0048","url":null,"abstract":"<p><p>Technological innovations can provide cyclists and their support team additional data. These data have potential to improve understanding of performance determinants and could be used to identify and tailor nutritional strategies to improve cycling performance. This potential, however, is dependent on the quality, interpretation, and practical use of the data generated. In this review, several technologies that are used or have some potential for use, in professional cycling are discussed. These include power meters, continuous glucose monitors, portable sweat and lactate analyzers, noninvasive estimation of muscle fiber typology, ultrasound for muscle glycogen concentrations and subcutaneous fat quantification, noninvasive core body temperature sensors, and portable substrate metabolism analyzers. The evidence regarding the validity of these technologies is critically evaluated, alongside a discussion of the potential rationale (or lack thereof) for their use in guiding nutritional strategies. Some of these technologies have sufficient validity and reliability to provide data of sufficient quality and, combined with appropriate rationale, can inform some nutritional strategies (e.g., energy expenditure from power meters). In contrast, other technologies either have insufficient rationale to inform a nutritional strategy or currently lack the validity and/or reliability to provide data of sufficient quality to inform nutritional strategies. Practitioners working with athletes are recommended to consider whether there is any practical value in each metric and, if so, then consider the validity and reliability of a method to measure such a metric before implementation.</p>","PeriodicalId":14334,"journal":{"name":"International journal of sport nutrition and exercise metabolism","volume":" ","pages":"1-13"},"PeriodicalIF":2.6,"publicationDate":"2025-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145033178","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nutrition for Mountain Biking and Cyclocross.","authors":"Tanja Oosthuyse, José J Muros, Mikel Zabala","doi":"10.1123/ijsnem.2025-0036","DOIUrl":"https://doi.org/10.1123/ijsnem.2025-0036","url":null,"abstract":"<p><p>The Union Cycliste Internationale recognizes several mountain biking (MTB) disciplines, including downhill, enduro, cross-country short track, cross-country Olympic, cross-country marathon, and multiday stage racing. Cyclocross is recognized as a separate cycling discipline. Both MTB and cyclocross include cycling on off-road surfaces of varying technicality on specialized bicycles purposed for the respective disciplines. The various discipline-specific racing formats and intensities dictate nutritional recommendations. High-paced race starts and high average race intensities support standard recommendations for caffeine and carbohydrate ingestion before and during racing and the adoption of recovery nutrient guidelines, tailored for each discipline. Notably, current quantification methods underestimate exercise intensity and exercise energy expenditure (EEE) in MTB and cyclocross because of the inability to quantify the additional energy cost of isometric contractions associated with bicycle handling while negotiating obstacles and dampening vibrations. Therefore, deriving EEE and target energy intake based on power measurements provide only minimum estimates, requiring a correction factor. Accordingly, minimum target energy intake should equate to the sum of power-derived EEE, +0.24 kcal·kg-1·km-1 off-road, resting metabolic rate, and an additional 0.45-fold resting metabolic rate (for nonexercise activity). Daily training nutrition based on standard guidelines is tailored by discipline, expected intensity, duration, and training EEE. Guidelines apply equally to both sexes. In addition, certain nutritional practices are suggested to support long-term bone health for MTB and cyclocross athletes.</p>","PeriodicalId":14334,"journal":{"name":"International journal of sport nutrition and exercise metabolism","volume":" ","pages":"1-14"},"PeriodicalIF":2.6,"publicationDate":"2025-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145029735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Effects of Caffeine Mouth Rinsing During the Battery of Soccer-Specific Tests in the Trained Male Soccer Players: Fasted Versus Fed State.","authors":"Hossein Miraftabi, Hossein Ghorbani, Pedram Souzandeh, Erfan Berjisian, Alireza Naderi, Shima Mojtahedi, Chad Kerksick","doi":"10.1123/ijsnem.2025-0040","DOIUrl":"https://doi.org/10.1123/ijsnem.2025-0040","url":null,"abstract":"<p><p>Caffeine (CAF) mouth rinsing has been considered a practical nutritional strategy among athletes. Recent studies indicate that this nutritional strategy's efficacy may depend on the athlete's prandial state. Therefore, the main aim of the current study is to determine the effect of CAF mouth rinsing on a battery of soccer-specific tests of soccer players in fasted (FST) or fed states (FED). Thirteen male soccer players (age: 18.1 ± 0.9 years, body mass: 60.1 ± 8.4 kg, height: 174.2 ± 7.3 cm, and body mass index: 20.14 ± 2.7 kg/m2) randomly participated in a randomized, double-blind, Latin square study design. Participants completed four experimental trials while performing eight serial mouth rinses of 750-mg CAF or a taste-matched placebo (PLA) for 15 s and then immediately expectorated. Two trials commenced 2 hr after a high-carbohydrate breakfast (FED), and two trials were performed after an overnight fast (FST). Following the final mouth rinse, sprint test, countermovement jump, Yo-Yo Intermittent Recovery Test Level 1, and rating of perceived exertion were measured, respectively. There was a main effect of condition for Yo-Yo Intermittent Recovery Test Level 1 performance (p = .021), while interaction between Condition × Prandial (p = .671) and the main effect of prandial state (p = .437) was not significant for Yo-Yo Intermittent Recovery Test Level 1 (CAF-FST = 2,155 ± 484 m, PLA-FST = 1,933 ± 549 m, CAF-FED = 2,098 ± 679 m, and PLA-FED = 1,864 ± 535 m). In addition, there was no significant main effect of condition, prandial, and interaction between Condition × Prandial for the sprint test and countermovement jump and the rating of perceived exertion (all p > .5). These data suggest that CAF mouth rinsing increases intermittent running performance in soccer players. This improvement is likely to be similar in the FST and FED states.</p>","PeriodicalId":14334,"journal":{"name":"International journal of sport nutrition and exercise metabolism","volume":" ","pages":"1-10"},"PeriodicalIF":2.6,"publicationDate":"2025-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145029789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Erratum. Acute Exercise Effects on Appetite and Energy Intake in People Living With Overweight and Obesity: A Systematic Review and Meta-Analysis.","authors":"","doi":"10.1123/ijsnem.2025-0175","DOIUrl":"10.1123/ijsnem.2025-0175","url":null,"abstract":"","PeriodicalId":14334,"journal":{"name":"International journal of sport nutrition and exercise metabolism","volume":" ","pages":"1"},"PeriodicalIF":2.6,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145000566","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Understanding Treatment Response Heterogeneity Using Crossover Randomized Controlled Trials: A Primer for Exercise and Nutrition Scientists.","authors":"Lorenzo Lolli, Javi Gonzalez, Oliver Shannon, Bruno Spellanzon, David J Stensel, Alice E Thackray, Greg Atkinson","doi":"10.1123/ijsnem.2025-0041","DOIUrl":"https://doi.org/10.1123/ijsnem.2025-0041","url":null,"abstract":"<p><p>Crossover randomized controlled trials (RCTs) are common in exercise and nutrition sciences. Since researchers randomize participants to different sequences of the treatment and comparator/control conditions, crossover RCTs are powerful for detecting mean treatment effects under certain circumstances. We aim to review the information that can be derived from crossover RCTs about treatment response heterogeneity-a fundamental issue in precision medicine for tailoring treatments to individuals. After covering the fundamental design issues, we describe the variance components that underlie observed data. The crucial person-by-treatment variance component can be quantified from a repeated or \"replicate\" crossover RCT by exposing participants to multiple cycles of trial conditions. As a type of n-of-1 trial, replicate crossover RCTs have important design and statistical power considerations, which we describe. By synthesizing findings from our six published replicate crossover RCTs, we also compare various data analysis approaches. We find general agreement between these approaches, and a link between within-person consistency of response and the detection of person-by-treatment interactions. We postulate that a paired \"variance comparison,\" for example, the Pitman-Morgan test, provides some preliminary information regarding response heterogeneity from a typical single-cycle crossover RCT. Nevertheless, underlying assumptions are critical, rendering these comparisons as merely exploratory until an n-of-1 or replicate crossover RCT is undertaken. Multiple-cycle n-of-1 trials and replicate crossover RCTs are underused but are informative for treatment response heterogeneity. However, these trials are still only one component of the process for predicting individual magnitude of response from any personal traits, which is the \"holy grail\" of personalized treatment.</p>","PeriodicalId":14334,"journal":{"name":"International journal of sport nutrition and exercise metabolism","volume":" ","pages":"1-28"},"PeriodicalIF":2.6,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144953912","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Acute Exercise Effects on Appetite and Energy Intake in People Living With Overweight and Obesity: A Systematic Review and Meta-Analysis.","authors":"Nan Li, Min Wu, Yanchun Li","doi":"10.1123/ijsnem.2025-0078","DOIUrl":"10.1123/ijsnem.2025-0078","url":null,"abstract":"<p><p>Overweight and obesity are associated with dysregulation of appetite-related hormones and altered energy intake. Exercise has been proposed as a strategy to modulate appetite and support weight management. A comprehensive search of databases, including Web of Science, PubMed, Scopus, Google Scholar, ScienceDirect, Academic Search Premier, and EBSCOHost, identified 19 studies (34 trials) for inclusion. Using a random-effects model, we calculated effect sizes (ES) for hormone concentration, appetite perception, and energy intake. Acute exercise exerted a moderate suppressive effect on acylated ghrelin (ES = -0.73) and a moderate, nonsignificant effect on insulin (ES = -0.55). A large but nonsignificant increase was observed for glucagon-like peptide-1 (ES = 3.96), while peptide YY showed a small, nonsignificant increase (ES = 0.24). Exercise significantly reduced hunger (ES = -0.35) and prospective food consumption (ES = -0.26), with minimal effects on fullness (ES = 0.16) and satiety (ES = 0.15). Significant reductions were found in both relative (ES = -0.54) and absolute energy intake (ES = -0.19). Exercise may be an effective short-term intervention for reducing appetite and energy intake among people living with overweight and obesity. Registration: PROSPERO CRD42024623903.</p>","PeriodicalId":14334,"journal":{"name":"International journal of sport nutrition and exercise metabolism","volume":" ","pages":"1-17"},"PeriodicalIF":2.6,"publicationDate":"2025-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144953957","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"International Tennis Federation (ITF), Women's Tennis Association (WTA), and Association of Tennis Professionals (ATP) Expert Group Statement on Nutrition in High-Performance Tennis. Current Evidence to Inform Practical Recommendations and Guide Future Research.","authors":"Néstor Vicente-Salar, Miguel Crespo Celda, Babette M Pluim, Jaime Fernández-Fernández, Kathleen Stroia, Todd Ellenbecker, David Sanz, Juan Del Coso, Víctor Moreno-Pérez, Brian Hainline, Álvaro López-Samanes, Jessica LaRoche, Susie Parker-Simmons, Miriam van Reijen, Machar Reid, Rob Duffield, Olivier Girard, Page Love, Elizabeth Broad, Shona Halson, Angel Ruiz-Cotorro, Santiago Sanz-Quinto, Ángel Ruiz-Cotorro, Alejandro Sánchez Pay, Louise M Burke","doi":"10.1123/ijsnem.2025-0001","DOIUrl":"https://doi.org/10.1123/ijsnem.2025-0001","url":null,"abstract":"<p><p>The sport of tennis involves unique nutritional demands for the physical and technical aspects of match play and training, as well as the nutritional challenges associated with extensive travel and a lengthy competition calendar. An expert group assembled by The International Tennis Federation, the Women's Tennis Association, and the Association of Tennis Professionals has produced a scientific review of current evidence to inform practical recommendations for high-performance tennis. The narrative summary considers the diversity within the tennis community, including male and female players, youth players, and wheelchair players. The Expert Group Statement addresses nine specific topics: (a) introduction to tennis; (b) physiological characteristics of tennis training and match play; (c) training nutrition; (d) body composition, low energy availability, and relative energy deficiency in sport; (e) match-day nutrition; (f) dietary supplements for tennis performance; (g) environmental and travel issues; (h) nutrition guidelines during periods of illness and injury rehabilitation; and (i) special population groups. The statement advocates for an evidence-based approach to nutrition in high-performance tennis and emphasizes a \"food first\" philosophy, prioritizing food over supplements to meet nutrient requirements effectively. In recognition of the benefits of sound nutrition, strategies in supporting health and performance over a player's career, academies, national federations, and international organizations are encouraged to engage professionals with appropriate nutrition-related qualifications and professional registrations to support players effectively.</p>","PeriodicalId":14334,"journal":{"name":"International journal of sport nutrition and exercise metabolism","volume":" ","pages":"1-38"},"PeriodicalIF":2.6,"publicationDate":"2025-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144953943","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Novel Honey Powder-Based Supplement Containing Carbohydrate and Protein Did Not Improve Endurance Performance in Recreationally Trained Cyclists.","authors":"Taíse Toniazzo, Rafael de Almeida Azevedo, Tamires Nunes Oliveira, Ricardo Augusto Silva de Souza, Leonardo Santos Vasco Marinho, Hamilton Roschel, Bruno Gualano, Bryan Saunders, Carmen Cecília Tadini","doi":"10.1123/ijsnem.2025-0021","DOIUrl":"https://doi.org/10.1123/ijsnem.2025-0021","url":null,"abstract":"<p><p>Sports supplements composed of carbohydrate and protein are widely used by endurance athletes and recreational practitioners, mostly aimed at improving performance. This study investigated the effect of a novel carbohydrate + protein honey powder (HP) product on endurance cycling performance and physiological and perceptual responses using a double-blind, crossover, counterbalanced, placebo-controlled (PLA) design. Twelve male cyclists exercised for 100 min (i.e., 5 min at 1 W/kg of body mass, followed by three sets of 10-min stages at 1.5, 2.0, and 2.5 W/kg, followed by 5 min at 1 W/kg), followed by a 20-min self-paced time trial (20-min TT). Blood glucose, lactate, pH, bicarbonate, heart rate, ratings of perceived exertion, and side effects were analyzed throughout the 100-min cycling protocol and the 20-min TT. The 20-min TT performance was similar between HP and PLA (total work done: 294 ± 40 vs. 292 ± 44 kJ, p = .72; mean power output: 245 ± 33 vs. 243 ± 37 W, p = .61), as was blood glucose, lactate, pH, and ratings of perceived exertion either during the 100 or 20-min TT protocols (all p > .05). Blood bicarbonate was lower in HP compared with PLA throughout the 100-min protocol (p = .01), and heart rate was higher in HP compared with PLA during the 20-min TT (p = .01). Finally, HP supplementation did not elicit greater side effects compared with PLA, either during the 100 or the 20-min TT protocols (all p > .05). This novel HP supplement did not improve endurance performance in this study, though future research with higher doses is encouraged.</p>","PeriodicalId":14334,"journal":{"name":"International journal of sport nutrition and exercise metabolism","volume":" ","pages":"1-10"},"PeriodicalIF":2.6,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144855185","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}