An amino acid-electrolyte beverage may increase cellular rehydration relative to carbohydrate-electrolyte and flavored water beverages

Nutrition Journal

Research

Susie L Oury¹  Carlos Mendez¹  Michael P Kim²  Laura R Carson²  Chih-Yin Tai²  Paul H Falcone²  Matt M Mosman²  Jordan M Joy²  Jordan R Moon³  Nick J Loveridge⁴  Justen L Straight⁵ 

[1] Metropolitan State University of Denver, Denver, CO, USA;MusclePharm Sports Science Institute, MusclePharm Corp, 4721 Ironton St., Building A, 80239, Denver, CO, USA;MusclePharm Sports Science Institute, MusclePharm Corp, 4721 Ironton St., Building A, 80239, Denver, CO, USA;Department of Sports Exercise Science, United States Sports Academy, Daphne, AL, USA;MusclePharm Sports Science Institute, MusclePharm Corp, 4721 Ironton St., Building A, 80239, Denver, CO, USA;University of Northern Colorado, Greeley, CO, USA;University of Nebraska, Lincoln, NE, USA;

关键词: Rehydration;    Fluid retention;    Amino acid;    Carbohydrate;    Electrolyte;    Hydration;    Recovery;   

DOI  :  10.1186/1475-2891-13-47

 received in 2014-03-27, accepted in 2014-05-06,  发布年份 2014

来源: Springer

【 摘 要 】

BackgroundIn cases of dehydration exceeding a 2% loss of body weight, athletic performance can be significantly compromised. Carbohydrate and/or electrolyte containing beverages have been effective for rehydration and recovery of performance, yet amino acid containing beverages remain unexamined. Therefore, the purpose of this study is to compare the rehydration capabilities of an electrolyte-carbohydrate (EC), electrolyte-branched chain amino acid (EA), and flavored water (FW) beverages.MethodsTwenty men (n = 10; 26.7 ± 4.8 years; 174.3 ± 6.4 cm; 74.2 ± 10.9 kg) and women (n = 10; 27.1 ± 4.7 years; 175.3 ± 7.9 cm; 71.0 ± 6.5 kg) participated in this crossover study. For each trial, subjects were dehydrated, provided one of three random beverages, and monitored for the following three hours. Measurements were collected prior to and immediately after dehydration and 4 hours after dehydration (3 hours after rehydration) (AE = −2.5 ± 0.55%; CE = −2.2 ± 0.43%; FW = −2.5 ± 0.62%). Measurements collected at each time point were urine volume, urine specific gravity, drink volume, and fluid retention.ResultsNo significant differences (p > 0.05) existed between beverages for urine volume, drink volume, or fluid retention for any time-point. Treatment x time interactions existed for urine specific gravity (USG) (p < 0.05). Post hoc analysis revealed differences occurred between the FW and EA beverages (p = 0.003) and between the EC and EA beverages (p = 0.007) at 4 hours after rehydration. Wherein, EA USG returned to baseline at 4 hours post-dehydration (mean difference from pre to 4 hours post-dehydration = -0.0002; p > 0.05) while both EC (-0.0067) and FW (-0.0051) continued to produce dilute urine and failed to return to baseline at the same time-point (p < 0.05).ConclusionBecause no differences existed for fluid retention, urine or drink volume at any time point, yet USG returned to baseline during the EA trial, an EA supplement may enhance cellular rehydration rate compared to an EC or FW beverage in healthy men and women after acute dehydration of around 2% body mass loss.

【 授权许可】

Unknown   
© Tai et al.; licensee BioMed Central Ltd. 2014. This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.