期刊
AMINO ACIDS
卷 43, 期 1, 页码 77-90出版社
SPRINGER WIEN
DOI: 10.1007/s00726-011-1158-x
关键词
Carnosine; Antioxidant; Sex; Running; Aerobic capacity; Supplement
The purpose of this study was to evaluate the effects of beta-alanine supplementation on markers of oxidative stress. Twenty-four women (age: 21.7 +/- A 2.1 years; VO(2)max: 2.6 +/- A 0.3 l min(-1)) were randomly assigned, in a double-blind fashion, to a beta-alanine (BA, 2 x 800 mg tablets, 3x daily; CarnoSyn(A (R)); n = 13) or placebo (PL, 2 x 800 mg maltodextrin tablets, 3x daily; n = 11) group. A graded oxygen consumption test (VO(2)max) was performed to evaluate VO(2)max, time to exhaustion, ventilatory threshold and establish peak velocity (PV). A 40-min treadmill run was used to induce oxidative stress. Total antioxidant capacity, superoxide dismutase, 8-isoprostane (8ISO) and reduced glutathione were measured. Heart rate and ratings of perceived exertion were recorded during the 40 min run. Separate three- [4 x 2 x 2; acute (base vs. IP vs. 2 vs. 4 h) x chronic (pre- vs. post-) x treatment (BA vs. PL)] and two- [2 x 2; time (pre-supplement vs. post-supplement) x treatment (BA vs. PL)] way ANOVAs were used for analyses. There was a significant increase in VO(2)max (p = 0.009), independent of treatment, with no significant changes in TTE (p = 0.074) or VT (p = 0.344). Ratings of perceived exertion values were significantly improved from pre- to post-supplementation for the BA group only at 40 min (p = 0.02). The ANOVA model demonstrated no significant treatment effects on oxidative stress. The chronic effects of BA supplementation demonstrated little antioxidant potential, in women, and little influence on aerobic performance assessments.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据