| Articles : Effects of Ham - Mixed (-)-Hydroxycitric Acid Ingestion on Energy Substrates Utilization during Endurance Exercise Performance |
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| Abstract |
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(-)-Hydroxycitric acid(HCA) is known to inhibit increasing malonyl-CoA concentration during endurance. Therefore, we investigated the 5 d administration of HCA mixed in the ham on the cycle ergometer exercise performance athletes. Subjects were administered the 250 ㎎ of HCA (250H), 750㎎ of HCA (750H) and control (Con) for 5 d after the breakfast then were performed cycle ergometer exercise begins with 50 W then increased, progressively. Bloods was collected at rest and every 15 min during exercise and expired gas samples were analyzed at rest and every 5 min at 60% VO_2max. and 80% VO_2max exercise. They exercised on the cycle ergometer at the 60% of their VO_2max for 1 h, and then the exercise intensity was increased at the 80% VO_2max until exhausted. Respiratory exchange ratio of HCA was significantly lower than that of Con (p<0.05). Fat oxidation was significantly increased with administration of HCA and carbohydrate oxidation was significantly decreased (p<0.05) during exercise. Increased fat oxidation has enhanced cycle ergometer exercise time to exhaustion after 1 h of 60% VO_2max exercise in HCA (p<0.05). These results suggested that HCA mixed in the ham enhance endurance performance without interfere fat metabolism, which spares stored glycogen utilization during moderate intensity exercise in athletes. |
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