Post-exercise Carbohydrate Supplementation With Hydroxycitric Acids Coingestion Increased Glycogen Resynthesis In Human Skeletal Muscle

Abstract

PURPOSE: The present study was designed to examine the effects of coingestion of HCA with post-exercise carbohydrate supplementation on human skeletal muscle glycogen resynthesis. METHODS: Six healthy active male volunteers (age, 22.00 ± 0.27 years) completed two experimental trials. Subjects performed a 60-min cycling exercise at 70-75% Vo2 max separated 7 days. After exercise, subjects consumed either a high carbohydrate meal (control group) or coingestion of HCA with high carbohydrate meal (HCA group). Postprandial blood samples were obtained at 30 min intervals for 3 h during exercise recovery. Muscle samples were obtained on vastus lateralis immediately after the exercise and 3 h after post-exercise. RESULTS: There were significant increase in muscle glycogen resynthesis in HCA group compared to control group (P<.05). Following exercise, the HCA group produced a significant lower insulin secretion level (P<.05) and no different blood glucose response, respiratory exchange ration, and carbohydrate oxidation compared to control group (P >.05). During post-exercise recovery, the HCA groups showed significant higher in total fat oxidation compared to control group (P<.05). Both diets resulted in a rapid reduction in NEFA and glycerol after post-exercise carbohydrate supplementation with the presence or absence of HCA coingestion and no significant difference between these two groups. CONCLUSIONS: the present study suggested that coingestion of HCA with carbohydrate supplementation during post-exercise recovery could be an effective way to enhance muscle glycogen resynthesis.