تاثير مصرف مكمل اسيد آمينه شاخه‌دار (BCAA) بر غلظت لاكتات دهيدروژناز و كوفتگي عضلاني تاخيري دانشجويان پسر ورزشكار

The Effect of Branched-Chain Amino Acid (BCAA) Supplementation on Indirect Indicators of Muscle Damage in Male Students

The purpose of this study was to determine the effect of branched-chain amino acid (BCAA) supplementation on indirect indicators of muscle damage (LDH, DOMS) in male students. Sixteen, healthy and trained young male students (age: 24.12±1.25 years, height: 174.59±4.63 centimeters, weight: 71.52±8.97 kilograms, body mass index: 23.40±2.19 kg/m2, percent of body fat: 11.81±1.21) were selected and divided to two groups randomly: BCAA (n=8) and placebo (n=8) and exercised 011 a treadmill at 90 - minute running bout with 70% V02max on one occasion. Beverages were administered five minutes before exercise, as well as at the 60-minute mark in a double-blind randomized study design. Indirect muscle damage markers (Lactate dehydrogenase and Ratings of perceived soreness) were assessed pre, 4-hours, and 24-hours post-exercise. 48-hours post-exercise ratings of perceived soreness were also recorded. Lactate dehydrogenize concentrations were elevated in the placebo trial at 4-hours as compared to the BCAA trial and ratings of perceived sore-ness were lower at 24- hours post-exercise following the BCAA trial. The present data suggest that BCAA supplementation attenuates muscle damage during prolong endurance exercise in trained males.