Carpentier Alain, Olbrechts Naïma, Vieillevoye Stéphanie, Poortmans Jacques R
Laboratory for Biometry and Exercise Nutrition, Faculty of Motor Sciences, Université libre de Bruxelles (ULB Belgium), Campus Erasme CP 640, 808 Route de Lennik, 1070, Brussels, Belgium,
Amino Acids. 2015 Jul;47(7):1479-83. doi: 10.1007/s00726-015-1981-6. Epub 2015 Apr 18.
β-Alanine (BA) supplementation has become an ergogenic aid amongst competitive athletes to augment intramuscular carnosine content, leading to higher buffer capacity and exercise performance. We investigated 27 regularly trained young males and females who were randomly allocated either to placebo (PL) or BA ingestion for 8 weeks. Every single day, BA or PL (4.0-5.6 g day(-1)) supplements were ingested by participants and associated with a strong plyometric high-intensity training (two sessions per week during the 8 weeks). Before and after training, maximal jump heights were recorded during squat jump (SJ) and countermovement jump (CMJ) and an index of fatigue was recorded as a mean height of 45 consecutive CMJ. Blood lactate was measured at rest, after completing the fatigue test and every 5 min thereafter up to 30 min recovery. After plyometric training, SJ and CMJ were increased, respectively, by 8.8 and 6.4 % in PL group and 9.9 and 11.0 % in BA group (p < 0.01, no difference between groups). Blood lactate reached a maximal value of 9.4 ± 1.6 mmol l(-1) in PL group, and 10.3 ± 1.3 mmol l(-1) in BA group, with a slight better performance in the fatigue test (+8.6 %, p ≤ 0.01) for BA group as compared to PL group. To conclude, 2-month β-alanine supplementation resulted in a slight improvement of explosive force after 45 maximal consecutive jumps in young athletes. However, the practical adequacy of supplementation remains questionable in an active and healthy population.
补充β-丙氨酸（BA）已成为竞技运动员增强肌肉肌肽含量的一种促力辅助手段，从而带来更高的缓冲能力和运动表现。我们对27名经常训练的年轻男性和女性进行了研究，他们被随机分为两组，一组服用安慰剂（PL），另一组摄入BA，为期8周。参与者每天摄入BA或PL（4.0 - 5.6克/天），并进行高强度的增强式训练（8周内每周两次）。在训练前后，记录深蹲跳（SJ）和反向纵跳（CMJ）的最大跳跃高度，并将连续45次CMJ的平均高度记录为疲劳指数。在休息时、完成疲劳测试后以及此后每5分钟直至恢复30分钟时测量血乳酸。经过增强式训练后，PL组的SJ和CMJ分别增加了8.8%和6.4%，BA组分别增加了9.9%和11.0%（p < 0.01，两组间无差异）。PL组血乳酸的最大值为9.4±1.6毫摩尔/升，BA组为10.3±1.3毫摩尔/升，与PL组相比，BA组在疲劳测试中的表现略好（+8.6%，p≤0.01）。总之，为期2个月的β-丙氨酸补充使年轻运动员在连续45次最大跳跃后爆发力略有提高。然而，在活跃健康人群中补充剂的实际适用性仍值得怀疑。
