International journal of sport nutrition and exercise metabolism最新文献_第4页

Erratum. Effect of Menstrual Cycle Phase and Hormonal Contraceptives on Resting Metabolic Rate and Body Composition. 勘误。月经周期阶段和荷尔蒙避孕药对静息代谢率和身体成分的影响

IF 3 3区医学

International journal of sport nutrition and exercise metabolism Pub Date : 2024-10-09 Print Date: 2025-01-01 DOI: 10.1123/ijsnem.2024-0203

引用次数: 0

Intrasession Caffeine Intake and Cycling Performance After Accumulated Work: A Field-Based Study. 会期咖啡因摄入量与累积工作后的自行车运动表现：基于现场的研究。

IF 3 3区医学

International journal of sport nutrition and exercise metabolism Pub Date : 2024-09-26 Print Date: 2025-01-01 DOI: 10.1123/ijsnem.2024-0109

Iván R Sánchez-Redondo, Lidia B Alejo, Carlos Revuelta, Raúl de Pablos, María Ibañez, Alberto Pérez-López, Alejandro Lucia, David Barranco-Gil, Pedro L Valenzuela

{"title":"Intrasession Caffeine Intake and Cycling Performance After Accumulated Work: A Field-Based Study.","authors":"Iván R Sánchez-Redondo, Lidia B Alejo, Carlos Revuelta, Raúl de Pablos, María Ibañez, Alberto Pérez-López, Alejandro Lucia, David Barranco-Gil, Pedro L Valenzuela","doi":"10.1123/ijsnem.2024-0109","DOIUrl":"10.1123/ijsnem.2024-0109","url":null,"abstract":"Background: Preexercise caffeine intake has proven to exert ergogenic effects on cycling performance. However, whether these benefits are also observed under fatigue conditions remains largely unexplored. We aimed to assess the effect of caffeine ingested during prolonged cycling on subsequent time-trial performance in trained cyclists.Methods: The study followed a triple-blinded, randomized, placebo-controlled cross-over design. Eleven well-trained junior cyclists (17 ± 1 years) performed a field-based 8-min time trial under \"fresh\" conditions (i.e., after their usual warm-up) or after two work-matched steady-state cycling sessions (total energy expenditure∼20 kJ/kg and ∼100 min duration). During the latter sessions, participants consumed caffeine (3 mg/kg) or a placebo ∼60 min before the time trial. We assessed power output, heart rate, and rating of perceived exertion during the time trial and mood state (Brunel Mood Scale) before and after each session.Results: No significant condition effect was found for the mean power output attained during the time trial (365 ± 25, 369 ± 31, and 364 32 W for \"fresh,\" caffeine, and placebo condition, respectively; p = .669). Similar results were found for the mean heart rate (p = .100) and rating of perceived exertion (p = 1.000) during the time trial and for the different mood domains (all p > .1).Conclusions: Caffeine intake during prolonged exercise seems to exert no ergogenic effects on subsequent time-trial performance in junior cyclists. Future studies should determine whether significant effects can be found with larger caffeine doses or after greater fatigue levels.","PeriodicalId":14334,"journal":{"name":"International journal of sport nutrition and exercise metabolism","volume":" ","pages":"61-66"},"PeriodicalIF":3.0,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142346707","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}

引用次数: 0

Erratum. Sweat Mineral-Element Responses During 7 h of Exercise-Heat Stress. 勘误。运动-热应激 7 小时期间汗液中矿物质元素的反应

IF 2.5 3区医学

International journal of sport nutrition and exercise metabolism Pub Date : 2024-09-12 DOI: 10.1123/ijsnem.2024-0189

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Menthol Mouth Rinsing Improves Cycling Performance in Trained Adolescent Males Under Heat Stress. 薄荷醇漱口可提高热应激下训练有素的青少年男子的自行车运动成绩。

IF 3 3区医学

International journal of sport nutrition and exercise metabolism Pub Date : 2024-08-30 Print Date: 2025-01-01 DOI: 10.1123/ijsnem.2024-0028

Kierstyn V Hawke, Erica H Gavel, David J Bentley, Heather M Logan-Sprenger

{"title":"Menthol Mouth Rinsing Improves Cycling Performance in Trained Adolescent Males Under Heat Stress.","authors":"Kierstyn V Hawke, Erica H Gavel, David J Bentley, Heather M Logan-Sprenger","doi":"10.1123/ijsnem.2024-0028","DOIUrl":"10.1123/ijsnem.2024-0028","url":null,"abstract":"Purpose: This study investigated the effect of menthol (MEN) mouth rinsing (MR) on cycling performance during a modified variable cycle test (M-VCT) in adolescent athletes under hot conditions (31.4 ± 0.9 °C, 23.4 ± 3.7% relative humidity).Methods: Trained adolescent male cyclists (n = 11, 16.7 ± 1.3 years, height 176.6 ± 8.8 cm, body mass 65.8 ± 11.6 kg, maximal oxygen uptake 62.97 ± 7.47 ml·kg-1·min-1) voluntarily completed three trials (familiarization and two experimental) of a 30-min M-VCT, which included five 6-min laps consisting of three 6-s accelerations and three 10-s sprints throughout each lap. In a randomized crossover design, MEN (0.01%) or placebo (PLA) (crystal-light), was swilled for 5 s before the start of each lap (total of 6 MR). Power output, distance (in kilometers), core temperature, heart rate, perceptual exertion, thermal stimulation (thermal comfort and thermal sensation), and blood lactate concentration were recorded.Results: MEN MR significantly improved M-VCT mean power output by 1.81 ± 1.57% compared to PLA (MEN, 177.8 ± 31.4 W; PLA, 174.7 ± 30.5 W, p < .001, 95% confidence interval [1.73, 4.46], d = 1.53). For maximal intermittent sprints, 6- and 10-s mean power output was significantly higher with MEN than PLA (6 s, p = .041, 95% confidence interval [0.73, 27.19], d = 0.71; 10 s, p = .002, 95% confidence interval [11.08, 35.22], d = 1.29). There was no significant difference in core temperature, heart rate, blood lactate concentration, or any perceptual measure between trials (p > .05) despite significantly higher work with MEN.Conclusion: 64% of athletes (7/11) improved M-VCT performance with MEN. The results of this investigation suggest that a MEN MR may improve power output during a sport-specific stochastic cycling task in elite adolescent male cyclists.","PeriodicalId":14334,"journal":{"name":"International journal of sport nutrition and exercise metabolism","volume":" ","pages":"34-42"},"PeriodicalIF":3.0,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142107405","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}

引用次数: 0

Response Letter: Pharmacokinetic Profile of Caffeine and Its Two Main Metabolites in Dried Blood Spots After Five Different Oral Caffeine Administration Forms-A Randomized Crossover Study. 回信：咖啡因及其两种主要代谢物在五种不同咖啡因口服给药形式下干燥血斑中的药代动力学特征--一项随机交叉研究

IF 3 3区医学

International journal of sport nutrition and exercise metabolism Pub Date : 2024-08-01 Print Date: 2024-09-01 DOI: 10.1123/ijsnem.2024-0138

Chiara Tuma, Andreas Thomas, Lasse Trede, Hans Braun, Mario Thevis

引用次数: 0

Letter to the Editor Regarding Tuma et al. (2024). 致编辑关于 Tuma 等人（2024 年）的信。

IF 3 3区医学

International journal of sport nutrition and exercise metabolism Pub Date : 2024-08-01 Print Date: 2024-09-01 DOI: 10.1123/ijsnem.2024-0057

Jeffrey A Rothschild, Ed Maunder, Bryan Saunders

引用次数: 0

Protein Intake Distribution: Beneficial, Detrimental, or Inconsequential for Muscle Anabolism? Response to Witard & Mettler. 蛋白质摄入量的分布：对肌肉合成代谢有益、有害还是无足轻重？回应 Witard & Mettler。

IF 3 3区医学

International journal of sport nutrition and exercise metabolism Pub Date : 2024-07-10 Print Date: 2024-09-01 DOI: 10.1123/ijsnem.2024-0107

Jorn Trommelen, Andrew M Holwerda, Luc J C van Loon

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An Opinion on the Interpretation of Bone Turnover Markers Following Acute Exercise or Nutrition Intervention and Considerations for Applied Research. 关于急性运动或营养干预后骨转换标志物的解释及应用研究的考虑因素的意见。

IF 3 3区医学

International journal of sport nutrition and exercise metabolism Pub Date : 2024-06-26 Print Date: 2024-09-01 DOI: 10.1123/ijsnem.2024-0003

Mark J Hutson, Ian Varley

{"title":"An Opinion on the Interpretation of Bone Turnover Markers Following Acute Exercise or Nutrition Intervention and Considerations for Applied Research.","authors":"Mark J Hutson, Ian Varley","doi":"10.1123/ijsnem.2024-0003","DOIUrl":"10.1123/ijsnem.2024-0003","url":null,"abstract":"It is important for athlete and public health that we continue to develop our understanding of the effects of exercise and nutrition on bone health. Bone turnover markers (BTMs) offer an opportunity to accelerate the progression of bone research by revealing a bone response to exercise and nutrition stimuli far more rapidly than current bone imaging techniques. However, the association between short-term change in the concentration of BTMs and long-term bone health remains ambiguous. Several other limitations also complicate the translation of acute BTM data to applied practice. Importantly, several incongruencies exist between the effects of exercise and nutrition stimuli on short-term change in BTM concentration compared with long-term bone structural outcomes to similar stimuli. There are many potential explanations for these inconsistencies, including that short-term study designs fail to encompass a full remodeling cycle. The current article presents the opinion that data from relatively acute studies measuring BTMs may not be able to reliably inform applied practice aiming to optimize bone health. There are important factors to consider when interpreting or translating BTM data and these are discussed.","PeriodicalId":14334,"journal":{"name":"International journal of sport nutrition and exercise metabolism","volume":" ","pages":"315-321"},"PeriodicalIF":3.0,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141456842","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}

引用次数: 0

Caffeine Gum Improves Reaction Time but Reduces Composure Versus Placebo During the Extra-Time Period of Simulated Soccer Match-Play in Male Semiprofessional Players. 与安慰剂相比，咖啡因口香糖可改善男性半职业球员在模拟足球比赛加时赛中的反应时间，但会降低其镇定程度。

IF 3 3区医学

International journal of sport nutrition and exercise metabolism Pub Date : 2024-06-25 Print Date: 2024-09-01 DOI: 10.1123/ijsnem.2023-0220

Adam Field, Liam Corr, Laurence Birdsey, Christina Langley, Ben Marshall, Greg Wood, Mark Hearris, Diogo Martinho, Christa Carbry, Robert Naughton, James Fleming, Magni Mohr, Peter Krustrup, Mark Russell, Liam David Harper

{"title":"Caffeine Gum Improves Reaction Time but Reduces Composure Versus Placebo During the Extra-Time Period of Simulated Soccer Match-Play in Male Semiprofessional Players.","authors":"Adam Field, Liam Corr, Laurence Birdsey, Christina Langley, Ben Marshall, Greg Wood, Mark Hearris, Diogo Martinho, Christa Carbry, Robert Naughton, James Fleming, Magni Mohr, Peter Krustrup, Mark Russell, Liam David Harper","doi":"10.1123/ijsnem.2023-0220","DOIUrl":"10.1123/ijsnem.2023-0220","url":null,"abstract":"This study aimed to determine whether caffeine gum influenced perceptual-cognitive and physical performance during the extra-time period of simulated soccer match-play. Semiprofessional male soccer players (n = 12, age: 22 ± 3 years, stature: 1.78 ± 0.06 m, mass: 75 ± 9 kg) performed 120-min soccer-specific exercise on two occasions. In a triple-blind, randomized, crossover design, players chewed caffeinated (200 mg; caffeine) or control (0 mg; placebo) gum for 5 min following 90 min of soccer-specific exercise. Perceptual-cognitive skills (i.e., passing accuracy, reaction time, composure, and adaptability) were assessed using a soccer-specific virtual reality simulator, collected pre- and posttrial. Neuromuscular performance (reactive-strength index, vertical jump height, absolute and relative peak power output, and negative vertical displacement) and sprint performance (15 and 30 m) were measured at pretrial, half-time, 90 min, and posttrial. Caffeine gum attenuated declines in reaction time (pre: 90.8 ± 0.8 AU to post: 90.7 ± 0.8 AU) by a further 4.2% than placebo (pre: 92.1 ± 0.8 AU to post: 88.2 ± 0.8 AU; p < .01). Caffeine gum reduced composure by 4.7% (pre: 69.1 ± 0.8 AU to post: 65.9 ± 0.8 AU) versus placebo (pre: 68.8 ± 0.8 AU to post: 68.3 ± 0.8 AU; p < .01). Caffeine gum did not influence any other variables (p > .05). Where caffeine gum is consumed by players prior to extra-time, reaction time increases but composure may be compromised, and neuromuscular and sprint performance remain unchanged. Future work should assess caffeine gum mixes with substances like L-theanine that promote a relaxed state under stressful conditions.","PeriodicalId":14334,"journal":{"name":"International journal of sport nutrition and exercise metabolism","volume":" ","pages":"286-297"},"PeriodicalIF":3.0,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141450458","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}

引用次数: 0

Effects of Phenylcapsaicin on Intraocular and Ocular Perfusion Pressure During a 30-Min Cycling Task: A Placebo-Controlled, Triple-Blind, Balanced Crossover Study. 苯卡西平对 30 分钟骑车任务中眼内压和眼灌注压的影响：一项安慰剂对照、三重盲法、平衡交叉研究。

IF 3 3区医学

International journal of sport nutrition and exercise metabolism Pub Date : 2024-06-25 Print Date: 2024-09-01 DOI: 10.1123/ijsnem.2024-0051

Paula M Lara Vázquez, María Dolores Morenas-Aguilar, Sara Chacón Ventura, Pablo Jiménez-Martínez, Carlos Alix-Fages, Amador García Ramos, Jesús Vera, Beatriz Redondo

{"title":"Effects of Phenylcapsaicin on Intraocular and Ocular Perfusion Pressure During a 30-Min Cycling Task: A Placebo-Controlled, Triple-Blind, Balanced Crossover Study.","authors":"Paula M Lara Vázquez, María Dolores Morenas-Aguilar, Sara Chacón Ventura, Pablo Jiménez-Martínez, Carlos Alix-Fages, Amador García Ramos, Jesús Vera, Beatriz Redondo","doi":"10.1123/ijsnem.2024-0051","DOIUrl":"10.1123/ijsnem.2024-0051","url":null,"abstract":"The main objective of this placebo-controlled, triple-blind, balanced crossover study was to assess the acute effects of phenylcapsaicin (PC) intake (2.5 mg) on intraocular pressure (IOP), ocular perfusion pressure (OPP), and heart rate (HR) during a 30-min cycling task performed at 15% of the individual maximal power. Twenty-two healthy young adults performed the cycling task 45 min after ingesting PC or placebo. IOP was measured with a rebound tonometer before exercise, during cycling (every 6 min), and after 5 and 10 min of recovery. OPP was assessed before and after exercise. HR was monitored throughout the cycling task. We found an acute increase of IOP levels related to PC consumption while cycling (mean difference = 1.91 ± 2.24 mmHg; p = .007, ηp2=.30), whereas no differences were observed for OPP levels between the PC and placebo conditions (mean difference = 1.33 ± 8.70 mmHg; p = .608). Mean HR values were higher after PC in comparison with placebo intake (mean difference = 3.11 ± 15.87 bpm, p = .019, ηp2=.24), whereas maximum HR did not differ between both experimental conditions (p = .199). These findings suggest that PC intake before exercise should be avoided when reducing IOP levels is desired (e.g., glaucoma patients or those at risk). Future studies should determine the effects of different ergogenic aids on IOP and OPP levels with other exercise configurations and in the long term.","PeriodicalId":14334,"journal":{"name":"International journal of sport nutrition and exercise metabolism","volume":" ","pages":"298-306"},"PeriodicalIF":3.0,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141450459","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}

引用次数: 0