Short-duration β-alanine supplementation increases training volume and reduces subjective feelings of fatigue in college football players
Short-duration β-alanine supplementation increases training volume and reduces subjective feelings of fatigue in college football players
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DOI：
10.1016/j.nutres.2007.11.004
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发表时间：
2008-01-01
影响因子：
4.5
通讯作者：
Wise, John A.
中科院分区：
文献类型：
--
作者：
Hoffman, Jay R.;Ratamess, Nicholas A.;Wise, John A.
本研究的目的是检查30天的β-丙氨酸补充剂在大学足球运动员的无氧性能指标的影响。受试者被随机分为补充剂组（β-丙氨酸组[BA]，4.5 g.d（-1）β-丙氨酸）或安慰剂组（安慰剂组[P]，4.5 g.d（-1）麦芽糊精）。在季前足球训练营前3周开始补充，并在训练营期间继续补充9天。表现指标包括60秒的温盖特无氧功率测试和3线演习（200码穿梭跑与短跑之间休息2分钟）评估的第一天的训练营。训练日志记录了阻力训练量，受试者完成了关于疼痛，疲劳和练习强度的主观感受的问卷调查。直线钻的疲劳率没有差异，但在Wingate无氧功率测试期间观察到BA的疲劳率低于P的趋势（P = 0.07）。在卧推运动中，BA的训练量显著更高，并且在所有阻力运动课程中都观察到更大训练量的趋势（P = 0.09）。此外，BA的主观疲劳感显著低于P。总之，尽管在60秒的最大运动期间有降低疲劳率的趋势，但3周的β-丙氨酸补充剂并没有导致高强度无氧运动期间疲劳率的显著改善。然而，BA中较高的训练量和较低的主观疲劳感表明，随着补充持续时间的持续，β-丙氨酸补充剂在训练有素的运动员中的疗效变得明显。(c)2008年爱思唯尔公司All rights reserved.
The purpose of this study was to examine the effect of 30 days of beta-alanine supplementation in collegiate football players on anaerobic performance measures. Subjects were randomly divided into a supplement (beta-alanine group [BA], 4.5 g.d(-1) of beta-alanine) or placebo (placebo group [P], 4.5 g.d(-1) of maltodextrin) group. Supplementation began 3 weeks before preseason football training camp and continued for an additional 9 days during camp. Performance measures included a 60-second Wingate anaerobic power test and 3 line drills (200-yd shuttle runs with a 2-minute rest between sprints) assessed on day 1 of training camp. Training logs recorded resistance training volumes, and subjects completed questionnaires on subjective feelings of soreness, fatigue, and practice intensity. No difference was seen in fatigue rate in the line drill, but a trend (P = .07) was observed for a lower fatigue rate for BA compared with P during the Wingate anaerobic power test. A significantly higher training volume was seen for BA in the bench press exercise, and a trend (P = .09) for a greater training volume was seen for all resistance exercise sessions. In addition, subjective feelings of fatigue were significantly lower for BA than P. In conclusion, despite a trend toward lower fatigue rates during 60 seconds of maximal exercise, 3 weeks of beta-alanine supplementation did not result in significant improvements in fatigue rates during high-intensity anaerobic exercise. However, higher training volumes and lower subjective feelings of fatigue in BA indicated that as duration of supplementation continued, the efficacy of beta-alanine supplementation in highly trained athletes became apparent. (c) 2008 Elsevier Inc. All rights reserved.