Pattaraporn Panpitpate. Comparative effects of high branched-chain amino acid drink, cow milk, or sports drink on performance in male football players. Master's Degree(Food and Nutrition). Chulalongkorn University. Office of Academic Resources. : Chulalongkorn University, 2015.
Comparative effects of high branched-chain amino acid drink, cow milk, or sports drink on performance in male football players
Abstract:
This study investigated the comparative effects of high branched-chain amino acid drink, cow milk or sports drink on the performance of 49 male football players aged between 16 and 18 years old in 4 school teams in Rayong province of Thailand. This is a single-blinded crossover trial with 3 subgroups:1) sports drink (140 kcal; 34 g Carbohydrate(CHO); 0.001 g Fat), 2) Cow milk (170 kcal; 9.0 g CHO; 10.0 g Fat; 10 g Protein including 1.5 g Branched-chain amino acids(BCAA) and 3) Branched chain amino acid (BCAA) (168 kcal; 25.9 g CHO; 2.8 g Fat; 10.8 g Protein including 4.5 g BCAA), which were administered in 250 ml package. Each group received a supplement drink after the completion of their match training program every day, for 10 days per supplement with 1-week washout period. Before and after each period these tests were measured: body fat composition, flexibility, muscular endurance, muscle power, speed and injury, and a 3-day food record. The results showed that the BCAA group significantly increased in body fat at 0.36±1.38% compared to cow milk group at 0.15±0.85%, while there was a decrease of 0.35±0.92% in the sports drink group. Flexibility test showed the modest significant increase in milk group at 0.88±2.00cm and 0.04±2.49cm in BCAA group, but lowered in sports drink group by 0.14±1.98cm. For the endurance test by push-ups there were increases of 3.76±8.50 and 0.33±9.10 times in sports drink group and BCAA group respectively, while a decrease was seen in cow milk group of 0.47±4.34 times. Sprint time showed mild significant increase in sports drink group. It was higher between pre and post intervention at 5 m 0.13±0.26 sec, 10 m 0.11±0.22 sec and 20 m 0.15±0.23 sec compared to cow milk group at 0.02±0.11 sec, 0.02±0.14 sec and 0.03±0.15sec, respectively. No significant disparity was observed for muscle power. Evaluation of injuries revealed a significant decrease in cow milk group between pre and post intervention, meanwhile, no significant difference was observed in sports drink group or BCAA group. The hips, knees and ankles were common injury spots. Muscle pain was aggravated when performing sport (p<0.05). In conclusion, branched-chain amino acid drink, sports drink and cow milk had mixed effects on physical performance, either beneficial or undesirable, in male football players.