International journal of sport nutrition and exercise metabolism最新文献_第3页

What's (Not) in Your Supplement? An Energy and Macronutrient Analysis of Commercially Available Carbohydrate Gels. 你的补充剂里（没有）什么？市售碳水化合物凝胶的能量和宏量营养素分析。

IF 3 3区医学

International journal of sport nutrition and exercise metabolism Pub Date : 2024-12-04 Print Date: 2025-03-01 DOI: 10.1123/ijsnem.2024-0174

Nicholas B Tiller, Louise M Burke, Stephanie M Howe, Jason Koop, Johanna R Ohm, Brady Burgess

{"title":"What's (Not) in Your Supplement? An Energy and Macronutrient Analysis of Commercially Available Carbohydrate Gels.","authors":"Nicholas B Tiller, Louise M Burke, Stephanie M Howe, Jason Koop, Johanna R Ohm, Brady Burgess","doi":"10.1123/ijsnem.2024-0174","DOIUrl":"10.1123/ijsnem.2024-0174","url":null,"abstract":"Carbohydrate (CHO) gels are a staple among endurance athletes. When ingested during competition, CHO gels can improve endurance performance by acting as an external energy substrate, sparing endogenous glycogen, mitigating the risk of hypoglycemia, and engaging the central nervous system via receptors in the mouth and gastrointestinal tract. However, published studies and a growing number of anecdotal reports have raised concerns about possible energy and macronutrient deficiencies in several products. We therefore performed a content analysis on CHO gels from Gu Energy, Honey Stinger, Hüma, Maurten, Näak, Precision Fuel, Science in Sport, and Spring Energy. On average, products contained significantly less energy than stated on the labels (n = 8, p = .047, large effect) but with no discrepancy in CHO content (n = 8, p = .219, medium effect). Bland-Altman analyses revealed a systematic bias toward less energy and CHO in measured samples relative to the label-derived nutritional information. Moreover, the Spring Energy product fell outside the 95% limits of agreement for both energy and CHO, containing ∼71% less energy (53 vs. 180 kcal) and ∼72% less CHO (12.5 vs. 45 g) than stated on the label. A follow-up analysis revealed similar discrepancies in several Spring Energy products from multiple lots. These findings have performance, clinical, and legal implications.","PeriodicalId":14334,"journal":{"name":"International journal of sport nutrition and exercise metabolism","volume":" ","pages":"162-170"},"PeriodicalIF":3.0,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142695486","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. What's (Not) in Your Supplement? An Energy and Macronutrient Analysis of Commercially Available Carbohydrate Gels. 勘误表。你的副刊里有什么（没有）？市售碳水化合物凝胶的能量和常量营养素分析。

IF 3 3区医学

International journal of sport nutrition and exercise metabolism Pub Date : 2024-12-04 Print Date: 2025-01-01 DOI: 10.1123/ijsnem.2024-0232

引用次数: 0

The Contribution of Whole-Food and Supplemental Derived Dietary Protein, From Animal and Nonanimal Origins, to Daily Protein Intake in Young Adults: A Cross-Sectional Analysis. 来自动物和非动物来源的全食物和补充膳食蛋白质对年轻人每日蛋白质摄入量的贡献：一项横断面分析。

IF 3 3区医学

International journal of sport nutrition and exercise metabolism Pub Date : 2024-11-28 Print Date: 2025-03-01 DOI: 10.1123/ijsnem.2024-0152

Freyja A D Haigh, Gráinne Whelehan, Sam West, Marianna C A Apicella, Kiera Wilkinson, Ino van der Heijden, Tom S O Jameson, George F Pavis, Alistair J Monteyne, Marlou L Dirks, Francis B Stephens, Benjamin T Wall

{"title":"The Contribution of Whole-Food and Supplemental Derived Dietary Protein, From Animal and Nonanimal Origins, to Daily Protein Intake in Young Adults: A Cross-Sectional Analysis.","authors":"Freyja A D Haigh, Gráinne Whelehan, Sam West, Marianna C A Apicella, Kiera Wilkinson, Ino van der Heijden, Tom S O Jameson, George F Pavis, Alistair J Monteyne, Marlou L Dirks, Francis B Stephens, Benjamin T Wall","doi":"10.1123/ijsnem.2024-0152","DOIUrl":"10.1123/ijsnem.2024-0152","url":null,"abstract":"We characterized daily dietary protein intakes, focusing on protein source (animal and nonanimal) and form (whole-foods and supplemental) in young (18-40 years) resistance trained (training ≥ 3×/week for ≥ 6 months; TRA; male, n = 30; female, n = 14) and recreationally active (no structured training; REC; male, n = 30; female, n = 30) individuals. Using 3-day weighed food diaries from 10 previous studies, we assessed macronutrient intakes using dietary analysis software. Energy intakes trended greater in TRA compared with REC (p = .056) and were greater in males than females (p = .006). TRA consumed greater (p = .002) proportions of daily energy intake as protein than REC (23 ± 6 vs. 19 ± 5%Energy), which also trended greater in males compared with females (22 ± 3 vs. 20 ± 2%Energy; p = .060). Absolute (p < .001) and relative (to body mass [BM]; p < .001) protein intakes were greater in TRA (males, 159 ± 54 g/day or 1.6 ± 0.7 g·kg-1 BM·day-1; females, 105 ± 40 g/day or 2.0 ± 0.6 g·kg-1 BM·day-1; p < .001) than REC (males, 103 ± 37 g/day or 1.3 ± 0.5 g·kg-1 BM·day-1; females, 85 ± 23 g/day or 1.3 ± 0.4 g·kg-1 BM·day-1; p < .001), with absolute (p = .025), but not relative (p = .129) intakes greater in males. A greater proportion of total protein was consumed from animal compared with nonanimal in TRA (68% vs. 32%, respectively; p < .001) and REC (64% vs. 36%, respectively; p < .001); the skew driven exclusively by males (72% vs. 28%, respectively; p < .001). A greater proportion (∼92%) of total protein was consumed as whole-foods compared with supplemental, irrespective of training status or sex (p < .001). We show animal and whole-food-derived proteins contribute the majority to daily dietary protein intakes in TRA and REC young males and females.","PeriodicalId":14334,"journal":{"name":"International journal of sport nutrition and exercise metabolism","volume":" ","pages":"120-130"},"PeriodicalIF":3.0,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142749973","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

Multiday Beetroot Juice Ingestion Improves Some Aspects of Neuromuscular Performance in Semi-Professional, Male Handball Players: A Randomized, Double-Blind, Placebo-Controlled, Crossover Study. 多日摄入甜菜根汁可改善半职业男子手球运动员的某些神经肌肉表现：一项随机、双盲、安慰剂对照、交叉研究。

IF 3 3区医学

International journal of sport nutrition and exercise metabolism Pub Date : 2024-11-23 Print Date: 2025-03-01 DOI: 10.1123/ijsnem.2024-0113

Alejandro Muñoz, Alfonso de la Rubia, Jorge Lorenzo-Calvo, Raci Karayigit, Marta Garcés-Rimón, Miguel López-Moreno, Raúl Domínguez, Aaron T Scanlan, Álvaro López-Samanes

{"title":"Multiday Beetroot Juice Ingestion Improves Some Aspects of Neuromuscular Performance in Semi-Professional, Male Handball Players: A Randomized, Double-Blind, Placebo-Controlled, Crossover Study.","authors":"Alejandro Muñoz, Alfonso de la Rubia, Jorge Lorenzo-Calvo, Raci Karayigit, Marta Garcés-Rimón, Miguel López-Moreno, Raúl Domínguez, Aaron T Scanlan, Álvaro López-Samanes","doi":"10.1123/ijsnem.2024-0113","DOIUrl":"10.1123/ijsnem.2024-0113","url":null,"abstract":"The aim of this study was to examine the effects of multiday beetroot juice ingestion on neuromuscular performance in semi-professional, male handball players. Twelve handball players competing in the second Spanish national division received 70 ml of beetroot juice (6.4 mmol of nitrate [NO3-]) or 70 ml of a placebo beetroot juice (0.04 mmol NO3-) for three consecutive days in a randomized, double-blind, crossover manner with a 1-week washout between conditions. Following supplementation in each condition, players completed a neuromuscular test battery involving handball throwing, isometric handgrip strength, countermovement jump, change-of-direction speed, and repeated-sprint assessments, with side effects also measured. Countermovement jump (4.7%; p = .038; Hedge's gav = 0.29) and isometric handgrip strength (7.8%; p = .021; gav = 0.59) were significantly superior with beetroot juice ingestion compared to the placebo. In contrast, nonsignificant differences were evident between conditions for all other neuromuscular performance variables (p > .05; gav = 0.00-0.27). Red urine production was the only side effect, demonstrating a significantly higher prevalence (p = .046) with beetroot juice ingestion. Three days of beetroot juice supplementation may be a useful nutritional strategy in semi-professional, male handball players given its ergogenic benefit to some aspects of neuromuscular performance.","PeriodicalId":14334,"journal":{"name":"International journal of sport nutrition and exercise metabolism","volume":" ","pages":"140-149"},"PeriodicalIF":3.0,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142695483","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

The Magnitude of the Blood Acid-Base Response, but Not Time to Peak, Is Reliable Following the Ingestion of Acute, Individualized Sodium Citrate. 摄入急性、个体化柠檬酸钠后，血液酸碱反应的幅度是可靠的，但达到峰值的时间却不可靠。

IF 3 3区医学

International journal of sport nutrition and exercise metabolism Pub Date : 2024-11-22 Print Date: 2025-03-01 DOI: 10.1123/ijsnem.2024-0122

Daniel J Tinnion, Ben Dobson, Nathan Hilton, Lars R McNaughton, S Andy Sparks

{"title":"The Magnitude of the Blood Acid-Base Response, but Not Time to Peak, Is Reliable Following the Ingestion of Acute, Individualized Sodium Citrate.","authors":"Daniel J Tinnion, Ben Dobson, Nathan Hilton, Lars R McNaughton, S Andy Sparks","doi":"10.1123/ijsnem.2024-0122","DOIUrl":"10.1123/ijsnem.2024-0122","url":null,"abstract":"Enhanced buffering capacity following sodium citrate (SC) ingestion may be optimized when subsequent exercise commences at individual time-to-peak (TTP) alkalosis (blood pH or bicarbonate concentration [HCO3-]). While accounting for considerable interindividual variation in TTP (188-300 min), a reliable blood alkalotic response is required for practical use. This study evaluated the reliability of blood pH, HCO3-, and sodium (Na+) following acute SC ingestion. Fourteen recreationally active males ingested 0.4 or 0.5 g/kg body mass (BM) of SC on two occasions each and 0.07 g/kg BM of sodium chloride (control) once. Blood pH and HCO3- were measured for 4 hr postingestion. Blood pH and HCO3- displayed good reliability following 0.5 g/kg BM SC (r = .819, p = .002, standardized technical error [sTE] = 0.67 and r = .840, p < .001, sTE = 0.63, respectively). Following 0.4 g/kg BM SC, blood HCO3- retained good reliability (r = .771, p = .006, sTE = 0.78) versus moderate for blood pH (r = .520, p = .099, sTE = 1.36). TTP pH was moderately reliable following 0.5 (r = .676, p = .026, sTE = 1.05) and 0.4 g/kg BM SC (r = .679, p = .025, sTE = 0.91) versus poor for HCO3- following 0.5 (r = .183, p = .361, sTE = 5.38) and 0.4 g/kg BM SC (r = .290, p = .273, sTE = 2.50). Although the magnitude of (and displacement in) blood alkalosis, particularly HCO3-, appears reliable following potentially ergogenic doses of SC, strategies based on individual TTP cannot be recommended.","PeriodicalId":14334,"journal":{"name":"International journal of sport nutrition and exercise metabolism","volume":" ","pages":"131-139"},"PeriodicalIF":3.0,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142692986","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. Acute Effects of Taurine Supplementation on Maximal Fat Oxidation and FATmax in Recreational Endurance Runners: A Randomized, Placebo-Controlled, Crossover, and Triple-Blinded Study. 勘误补充牛磺酸对休闲耐力跑运动员最大脂肪氧化和最大脂肪率的急性影响：一项随机、安慰剂对照、交叉和三盲研究。

IF 3 3区医学

International journal of sport nutrition and exercise metabolism Pub Date : 2024-11-19 Print Date: 2025-01-01 DOI: 10.1123/ijsnem.2024-0218

引用次数: 0

Acute Effects of Taurine Supplementation on Maximal Fat Oxidation and FATmax in Recreational Endurance Runners: A Randomized, Placebo-Controlled, Crossover, and Triple-Blinded Study. 补充牛磺酸对休闲耐力跑运动员最大脂肪氧化和最大脂肪率的急性影响：一项随机、安慰剂对照、交叉和三盲研究。

IF 3 3区医学

International journal of sport nutrition and exercise metabolism Pub Date : 2024-11-19 Print Date: 2025-01-01 DOI: 10.1123/ijsnem.2024-0076

Abdolrahman Ghazzagh, Alireza Naderi, Hamid Agha-Alinejad, Ali Livani, Mohsen Sarlak, Samaneh Aghamohammadi, Bryan Saunders

{"title":"Acute Effects of Taurine Supplementation on Maximal Fat Oxidation and FATmax in Recreational Endurance Runners: A Randomized, Placebo-Controlled, Crossover, and Triple-Blinded Study.","authors":"Abdolrahman Ghazzagh, Alireza Naderi, Hamid Agha-Alinejad, Ali Livani, Mohsen Sarlak, Samaneh Aghamohammadi, Bryan Saunders","doi":"10.1123/ijsnem.2024-0076","DOIUrl":"10.1123/ijsnem.2024-0076","url":null,"abstract":"Taurine (TAU) has been shown to improve time to exhaustion (TTE) and fat oxidation during exercise; however, no studies have examined the effect of acute TAU supplementation on maximal fat oxidation (MFO) and related intensity to MFO (FATmax). Our study aimed to investigate the effect of acute TAU supplementation on MFO, FATmax, VO2peak, and TTE. Eleven recreationally trained male endurance runners performed three incremental running tests. The first visit included a familiarization to the test, followed by two subsequent visits in which exercise was performed 90 min after ingestion of either 6-g TAU or placebo (PLA) using a triple-blind randomized crossover design. There was no effect of TAU on MFO (p = .89, d = -0.07, TAU: 0.48 ± 0.22 g/min; PLA: 0.49 ± 0.15 g/min or FATmax (p = .26, d = -0.66; TAU: 49.17 ± 15.86 %V˙O2peak; PLA: 56.00 ± 13.27 %V˙O2peak). TTE was not significantly altered (TAU: 1,444.8 ± 88.6 s; PLA: 1,447.6 ± 87.34 s; p = .65, d = -0.04). TAU did not show any effect on V˙O2peak in comparison with PLA (TAU: 58.9 ± 8.4 ml·kg-1·min-1; PLA: 56.5 ± 5.7 ml·kg-1·min-1, p = .47, d = 0.48). However, V˙O2 was increased with TAU at most stages of exercise with large effect sizes. The acute ingestion of 6 g of TAU before exercise did not enhance MFO, FATmax, or TTE. However, it did increase the oxygen cost of running fixed intensities in recreationally trained endurance runners.","PeriodicalId":14334,"journal":{"name":"International journal of sport nutrition and exercise metabolism","volume":" ","pages":"3-11"},"PeriodicalIF":3.0,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142465490","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

Isolated and Combined Effects of Moderate Normobaric Hypoxia and Sleep Restriction on Energy Intake and Food Reward. 中度常压低氧和睡眠限制对能量摄入和食物奖励的单独和联合影响

IF 3 3区医学

International journal of sport nutrition and exercise metabolism Pub Date : 2024-11-11 Print Date: 2025-01-01 DOI: 10.1123/ijsnem.2024-0146

Paco Clavé, Pierre Fabries, Vincent Beauchamps, Anaïs Pontiggia, Louis David, Pascal Van Beers, Mathias Guillard, Blandine Tavard, Alexandra Malgoyre, Nathalie Koulmann, Danielle Gomez-Merino, Fabien Sauvet, Mounir Chennaoui, Keyne Charlot

{"title":"Isolated and Combined Effects of Moderate Normobaric Hypoxia and Sleep Restriction on Energy Intake and Food Reward.","authors":"Paco Clavé, Pierre Fabries, Vincent Beauchamps, Anaïs Pontiggia, Louis David, Pascal Van Beers, Mathias Guillard, Blandine Tavard, Alexandra Malgoyre, Nathalie Koulmann, Danielle Gomez-Merino, Fabien Sauvet, Mounir Chennaoui, Keyne Charlot","doi":"10.1123/ijsnem.2024-0146","DOIUrl":"10.1123/ijsnem.2024-0146","url":null,"abstract":"Hypoxia (HY) and sleep deprivation have opposite effects on appetite. As HY may alter sleep, it may be informative to assess the accumulative effects of these two stressors on hunger, energy intake (EI), and food reward. Seventeen young, active, healthy males completed four 5-hr sessions in normoxia (NO) or normobaric HY (FIO2 = 13.6%, ∼3,500 m) after a night of habitual sleep (HS; total sleep time >6 hr) or sleep restriction (SR; total sleep time <3 hr). Subjective appetite was assessed regularly using visual analogic scales and EI during an ad libitum lunch after 3.5 hr of exposure. Food reward was assessed using the Leeds Food Preference Questionnaire just before the lunch. As expected, EI was lower for the HY-HS (4.32 ± 0.71 MJ; p = .048) and HY-SR (4.16 ± 0.68 MJ, p = .013) sessions than the NO-HS (4.90 ± 0.84 MJ) session without acute mountain sickness-related gastrointestinal symptoms. No significant effect of SR alone was observed (NO-SR: 4.40 ± 0.68 MJ). Subjective appetite was not affected. Explicit liking for high-fat foods was higher with SR than HS (main effect: p = .002) and implicit wanting for high-fat foods was higher for the NO-SR, HY-HS, and HY-SR sessions than the NO-HS session (p < .006). Thus, acute SR did not modify subjective appetite or EI despite the increasing food reward for high-fat foods and did not alter the HY-induced changes of appetite or food reward.","PeriodicalId":14334,"journal":{"name":"International journal of sport nutrition and exercise metabolism","volume":" ","pages":"51-60"},"PeriodicalIF":3.0,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142620456","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

Postexercise Dietary Leucine Retention for Whole-Body Anabolism Is Greater With Whey Protein Isolate and Fish-Derived Protein Hydrolysate Than Nonessential Amino Acids in Trained Young Men. 与非必需氨基酸相比，训练有素的年轻男性在运动后摄入乳清蛋白异构体和鱼源性蛋白水解物对全身合成代谢所需的亮氨酸保留率更高。

IF 3 3区医学

International journal of sport nutrition and exercise metabolism Pub Date : 2024-11-11 Print Date: 2025-01-01 DOI: 10.1123/ijsnem.2024-0157

Mark Evans, Matthew J Lees, Jonathan A Aguilera, Daniel W D West, Guilherme W P da Fonseca, Miryam Amigo-Benavent, Brian P Carson, Daniel R Moore, Brendan Egan

{"title":"Postexercise Dietary Leucine Retention for Whole-Body Anabolism Is Greater With Whey Protein Isolate and Fish-Derived Protein Hydrolysate Than Nonessential Amino Acids in Trained Young Men.","authors":"Mark Evans, Matthew J Lees, Jonathan A Aguilera, Daniel W D West, Guilherme W P da Fonseca, Miryam Amigo-Benavent, Brian P Carson, Daniel R Moore, Brendan Egan","doi":"10.1123/ijsnem.2024-0157","DOIUrl":"10.1123/ijsnem.2024-0157","url":null,"abstract":"Marine-derived proteins, such as blue whiting-derived protein hydrolysates (BWPH), represent high-quality sources of dietary protein, but their ability to support postexercise anabolism is not established. The impact of BWPH on whole-body anabolism was compared with an isonitrogenous whey protein isolate (WPI) and nonessential amino acid (NEAA) control in 10 trained young males (31 ± 4 years) who, on three separate visits, performed a session of whole-body resistance exercise and then consumed, in randomized crossover fashion, BWPH, WPI, or NEAA (0.33 g/kg; 19, 33, and 0 mg/kg leucine, respectively) with L-[1-13C]leucine. Breath, blood, and urine samples were collected for 6-hr postprandial to assess dietary leucine oxidation, amino acid (AA) concentrations, and 3-methylhistidine: creatinine ratio. Peak and area under the curve concentrations for leucine, branched-chain amino acids, and essential amino acids were greater in WPI compared with BWPH (all p < .05) but with no differences in time to peak concentration. Total oxidation reflected leucine intake (WPI > BWPH > NEAA; p < .01), whereas relative oxidation was greater (p < .01) in WPI (28.6 ± 3.6%) compared with NEAA (21.3 ± 4.2%), but not BWPH (28.6 ± 8.8%). Leucine retention, a proxy for whole-body protein synthesis, was greater in WPI (185.6 ± 9.5 μmol/kg) compared with BWPH (109.3 ± 14.1 μmol/kg) and NEAA (5.74 ± 0.30 μmol/kg; both p < .01), with BWPH being greater than NEAA (p < .01). Urinary 3-methylhistidine: creatinine ratio did not differ between conditions. Both WPI and BWPH produced essential aminoacidemia and supported whole-body anabolism after resistance exercise, but a higher intake of BWPH to better approximate the leucine and EAA content of WPI may be needed to produce an equivalent anabolic response.","PeriodicalId":14334,"journal":{"name":"International journal of sport nutrition and exercise metabolism","volume":" ","pages":"24-33"},"PeriodicalIF":3.0,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142620457","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 Caffeine Ingestion on Pulmonary V˙O2 Kinetics and Muscle Fatigue During Severe-Intensity Cycling Exercise. 摄入咖啡因对高强度自行车运动中肺部 V˙O2动力学和肌肉疲劳的影响

IF 3 3区医学

International journal of sport nutrition and exercise metabolism Pub Date : 2024-11-08 Print Date: 2025-03-01 DOI: 10.1123/ijsnem.2024-0141

Rafael Leal Dantas Estrela, Jean de Souza Dos Santos, Paulo Cesar do Nascimento Salvador, Thiago Pereira Ventura, Gustavo Oneda, Ricardo Dantas de Lucas, Tiago Turnes, Luiz Guilherme Antonacci Guglielmo

{"title":"Effects of Caffeine Ingestion on Pulmonary V˙O2 Kinetics and Muscle Fatigue During Severe-Intensity Cycling Exercise.","authors":"Rafael Leal Dantas Estrela, Jean de Souza Dos Santos, Paulo Cesar do Nascimento Salvador, Thiago Pereira Ventura, Gustavo Oneda, Ricardo Dantas de Lucas, Tiago Turnes, Luiz Guilherme Antonacci Guglielmo","doi":"10.1123/ijsnem.2024-0141","DOIUrl":"10.1123/ijsnem.2024-0141","url":null,"abstract":"Introduction: This study aimed to analyze the effect of caffeine (CAF) intake on pulmonary oxygen uptake (V˙O2) kinetics, muscle fatigue, and physiological and perceptual parameters during severe-intensity cycling exercise.Methods: Twelve physically active men (age: 26 ± 5 years; V˙O2peak: 46.7 ± 7.8 ml·kg-1·min-1) participated of this placebo (PLA)-controlled, randomized, double-blinded, and crossover design study. Participants performed on separate days (a) a ramp incremental test to determine V˙O2peak and gas exchange threshold and (b) four 8-min constant work rate tests at 60% of the difference between gas exchange threshold and maximal V˙O2peak (i.e., Δ60%) 1 hr after taking either 6 mg/kg of body mass of CAF or PLA. Before and immediately after constant work rate tests, a 5-s all-out isokinetic sprint was performed to assess the muscle torque. V˙O2 kinetics, blood lactate concentration ([La]), and rating of perceived exertion were analyzed during constant work rate tests.Results: CAF did not alter the primary time constant of V˙O2 kinetics (PLA: 38.3 ± 14; CAF: 36.7 ± 7.5 s), V˙O2 slow component (PLA: 0.5 ± 0.2; CAF: 0.5 ± 0.2 L/min), or peak torque (PLA: 144.6 ± 18.6; CAF: 143.9 ± 18.7 N·m). CAF decreased rating of perceived exertion (15.9 ± 1.8 vs. 17.0 ± 1.5 a.u.) and increased blood lactate concentration (9.0 ± 2.5 vs. 8.3 ± 2.2 mmol/L; p < .05) after constant work rate tests compared with PLA.Conclusion: CAF ingestion does not alter V˙O2 kinetics or muscle torque production during 8 min of severe-intensity cycling exercise.","PeriodicalId":14334,"journal":{"name":"International journal of sport nutrition and exercise metabolism","volume":" ","pages":"112-119"},"PeriodicalIF":3.0,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142604080","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