Effects of acute β-alanine supplementation on countermovement jump performance after a 4x400 m running fatigue protocol

This study aimed to examine the effect of acute beta-alanine (β-alanine) supplementation on jump performance after a strenuous fatigue protocol. Twelve healthy young men (age 21.4±0.5 years, body height 180.2±5.8 cm, mass 76.6±9.2 kg) volunteered participate in this randomized, double-blind, placebo-controlled trial. The experimental group ingested 3.2 g β-alanine (separated into two 1.6 dosages) mixed with 23 glucose, whereas placebo dosages containing glucose. Following intake, participants completed protocol involving countermovement (CMJ) and four consecutive jumps (CMJ-4). Subsequently, 4x400 m running was carried out produce fatigue. After protocol, same jumping tests were repeated, CMJ CMJ-4, evaluate loss height. Mann-Whitney U test used analyze differences between groups, Wilcoxon signed-rank conducted within groups statistical significance set at p<.05. supplementation, no significant decrease found none Conversely, noticed but not CMJ-4 test. In conclusion, an could attenuate Therefore, athletes coaches should consider sports high-intensity exercises which muscle acidosis is highly increased.