| Background: The aim of this study was to evaluate the effects of supplementation of
Branched-Chain Amino Acids (BCAAs) plus carbohydrate (CHO) and whey protein plus
CHO on muscle damage indices after eccentric resistant exercise.
Materials and Methods: Twenty four untrained healthy males participated in this study. They
were randomly divided into three groups, BCAA +glucose (0.1+0.1g/kg) supplement group
(n=8), Whey+glucose (0.1+0.1g/kg) supplement group (n=8), and placebo (malto dextrin
0.2g/kg) group (n=8). Each subject consumed a carbohydrate beverage with addition of whey
protein or branched-chain amino acid or placebo 30 minutes before exercise in a
randomized,double-blind fashion. Serum levels of Creatine Kinase (CK), Lactate
dehydrogenase (LDH), and muscle pain were measured before, 24, 48, 72 h after exercise.
Follow-up analyses included 1-way repeated measures ANOVAs, and Bonferroni post hoc
comparisons.
Results: 24 h after test, serum levels of CK, LDH and muscle pain in both supplement
groups were increased less than placebo group (0.015, 0.001 and 0.001, respectively). Also,
the levels of CK and LDH showed significant changes in both intervention groups compared
to placebo group at 24 h (0.001, 0. 015, respectively). Similarly, significant differences in the
levels of CK and LDH between groups were observed.
Conclusion: These data indicate that muscle damage and pain after resistant exercise
were reduced by an ingestion of either BCAA drink or whey protein drink. |