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Journal of Exercise Nutrition & Biochemistry 2003;7(3):311-316.
Articles : Effects of High Carbohydrate Diet on Glycogen Contents and Exercise Performance in Different Gender Rats
Abstract
The purpose of this study was the effects of high carbohydrate diet on glycogen contents and exercise performance in male and female rats. Sprague-Dawley rats (male 24, female 24) were used in the present study. Among them 6 rats of each group were isolated during experimental periods. The others were exercised on the treadmill (8% incline) at 30 m/min, 30 min/day, and 5 days/week for 4 weeks. They were fed high carbohydrate diet (CHO: 70%, Protein: 20%, and Fat: 10%) using pair-feeding method during exercise periods. Blood glucose concentration was decreased during exercise in both groups and, male rats tended to higher than female rats. Blood lactate concentration was increased during exercise in both groups and, male rats showed significantly higher than female rats at post exercise. Free fatty acid concentration, however, was significantly higher in female rats even though they have fed same carbohydrate diet during exercise periods. Muscle and liver glycogen concentration was not significantly different in both groups during exercise. These results suggested that although lipid utilization was increased in female rats, glycogen utilization was similar in both groups. So, the effects of high carbohydrate diet on glycogen contents and exercise performance in different gender rats results were investigated for the near future.
Key Words: Gender, Glycogen loading, Exhaustive exercise, Rat


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