| 摘要: | Purpose: To investigate the effect of short-term (-)-hydroxycitric acid (HCA) supplementation on endurance exercise performance. Methods: Seventeen healthy males volunteered to participate in this single blind study, and were randomly divided in two groups: H group (HCA, 2.5 g/day, n=9, age: 21.7±2.4 yrs, height: 177.9±6.4 cm, weight: 67.4±5.9 kg) and P group (cellulose, 2.5 g/day, n=8, age: 21.7±1.7 yrs, height: 173.3±4.2 cm, weight: 66.6±7.7 kg). Before and after a 5-day load of HCA or placebo, all subjects performed an incremental endurance exercise test. The incremental endurance exercise test included 10-min mild (40%(The symbol is abbreviated)O2max) and 10-min heavy (80%(The symbol is abbreviated)O2max) exercises. The slope of treadmill was increased two degrees every three minutes till volitional exhaustion. Body composition was measured by bioelectrical impedance analyzer. Results: There were not different in body composition, respiratory exchange rate (RER), fat oxidation and exercise performance between the H group and P group (p＞ .05), but there were significant differences in carbohydrate oxidation (CHO oxidation) between the H group and P group (p＜ .05). However, muscle mass, lean body mass, fat oxidation and exercise performance were significantly increased after supplementation, and the RER and CHO oxidation were significantly decreased in H group during the mild endurance exercise(p＜ .05). Conclusion: Short-term HCA supplementation could decrease the CHO oxidation during the lower intensity endurance exercise. |
