The effect of branched chain amino acids on psychomotor performance during treadmill exercise of changing intensity simulating a soccer game

• DOI: 10.1139/h11-110
• Publication Date: 2011-12-02T23:59:01Z
• Authors: Piotr Wiśnik; Jan Chmura; Andrzej Wojciech ...; Tomasz Mikulski; Krystyna Nazar
• Keywords: Treadmill; Intensity

The present study was designed to determine changes in the multiple-choice reaction time (MRT) during treadmill running simulating locomotor activity a soccer game and examine effect of branched chain amino acids (BCAA) ingestion on psychomotor performance effort. Ten male players were submitted BCAA placebo trials at 1-week intervals randomized order. (7 g) or given 1 h before exercise double blind manner. test consisted two 45 min bouts separated by 15-min passive rest period whole ended with 20-min active recovery. Running–walking speed changed from 0 6.4 m·s –1 according time-motion analysis match. During test, blood samples taken for lactate, glucose, free fatty acid, catecholamine determination. Following treatment, MRT shortened 320 ± 18 271 11 ms (p < 0.001) first bout then it increased resting break 303 138 0.05). second bout, decreased 280 13 0.001). recovery, further shortening noted. trial, shorter than trial ~10% 0.05) exercise. No significant differences found between biochemical indices. It is concluded that supplementation might be recommended sport activities change intensity require quick responses external signals (e.g., other team games).