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

Nutrition Journal

Jordan R Moon³  Michael P Kim¹  Nick J Loveridge⁴  Carlos Mendez²  Susie L Oury²  Justen L Straight⁵  Matt M Mosman¹  Laura R Carson¹  Paul H Falcone¹  Jordan M Joy¹  Chih-Yin Tai¹ 

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

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

Others  :  801394
DOI  :  10.1186/1475-2891-13-47

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

【 摘 要 】

Background

In 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.

Methods

Twenty 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.

Results

No 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).

Conclusion

Because 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】

   
2014 Tai et al.; licensee BioMed Central Ltd.

【 图 表 】

Figure 1.

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