E. Goldstein, Jeffrey R Stout, Tristan M. Starling-Smith, D. Fukuda
{"title":"Carbohydrate-Protein Coingestion Enhances Cycling Performance with Minimal Recovery Time between Bouts of Exhaustive Intermittent Exercise","authors":"E. Goldstein, Jeffrey R Stout, Tristan M. Starling-Smith, D. Fukuda","doi":"10.53520/jen2022.103125","DOIUrl":null,"url":null,"abstract":"Introduction: The addition of protein to a carbohydrate solution has been shown to effectively stimulate glycogen synthesis in an acute setting and enhance exercise performance in a subsequent bout of exhaustive exercise. This study examined the effects of carbohydrate-protein (CHO-P), carbohydrate (CHO), and placebo (PLA) within a 2-hour recovery period on subsequent high-intensity exercise performance.\nMethods: This was a randomized, single-blind between-subject design. Participants (n = 25) were assigned to consume one of three beverages during a 2-hour recovery period: PLA, CHO (1.2 g/kg bm), or CHO-P (0.8 g/kg bm CHO + 0.4 g/kg bm PRO). During Visit#1, participants completed graded exercise testing (VO2peak; cycle ergometer). Familiarization (Visit#2) consisted of 5 x 4 min intervals at 70-80% of peak power output [PPO, watts] with two minutes of active recovery at 50W, followed by time to exhaustion [TTE] at 90% PPO. The same high-intensity interval protocol with TTE was conducted pre-and post-beverage consumption on Visit #3.\nResults: The ANCOVA indicated a significant difference among the group means for the posttest TTE (F2,21=8.248, p=.002, ƞ2=.440) and RER (F2,21=6.811, p=.005, ƞ2=.393) values after adjusting for the pretest differences.\nConclusions: Carbohydrate-protein co-ingestion was effective in promoting an increase in TTE performance with limited time to recover.","PeriodicalId":73743,"journal":{"name":"Journal of exercise and nutrition","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2022-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of exercise and nutrition","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.53520/jen2022.103125","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 1
Abstract
Introduction: The addition of protein to a carbohydrate solution has been shown to effectively stimulate glycogen synthesis in an acute setting and enhance exercise performance in a subsequent bout of exhaustive exercise. This study examined the effects of carbohydrate-protein (CHO-P), carbohydrate (CHO), and placebo (PLA) within a 2-hour recovery period on subsequent high-intensity exercise performance.
Methods: This was a randomized, single-blind between-subject design. Participants (n = 25) were assigned to consume one of three beverages during a 2-hour recovery period: PLA, CHO (1.2 g/kg bm), or CHO-P (0.8 g/kg bm CHO + 0.4 g/kg bm PRO). During Visit#1, participants completed graded exercise testing (VO2peak; cycle ergometer). Familiarization (Visit#2) consisted of 5 x 4 min intervals at 70-80% of peak power output [PPO, watts] with two minutes of active recovery at 50W, followed by time to exhaustion [TTE] at 90% PPO. The same high-intensity interval protocol with TTE was conducted pre-and post-beverage consumption on Visit #3.
Results: The ANCOVA indicated a significant difference among the group means for the posttest TTE (F2,21=8.248, p=.002, ƞ2=.440) and RER (F2,21=6.811, p=.005, ƞ2=.393) values after adjusting for the pretest differences.
Conclusions: Carbohydrate-protein co-ingestion was effective in promoting an increase in TTE performance with limited time to recover.