Chandrasekara, A., Denyer, G. and Caterson, I. 2003, Glycemic index and glycogen, in Proceedings of the Australian Conference of Science and Medicine in Sport and Third National Sports Injury Prevention Conference, Sports Medicine Australia, [Dickson, A.C.T], pp. 66-66.
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Proceedings of the Australian Conference of Science and Medicine in Sport and Third National Sports Injury Prevention Conference
Sports Medicine Australia
Place of publication
INTRODUCTION : Fatigue in sports is often associated with depletion of muscle glycogen storage. Obesity is considered to be a major barrier against physical activity in sports. In order to bring the glycogen storage to a satisfactory level sports persons tend to increase consumption carbohydrates, preferred consumption of high glycemic index (HGI) than low glycemic index (LGI) diets. But HGI foods may promote postprandial carbohydrate oxidation at the expense of fat oxidation and increase body fat gain. LGI diets that produce a low and slow glycemic response may enhance higher glycogen storage instead of fat deposition. METHODOLOGY : To test this hypothesis, 30 male Wistar rats after weaning were given either a high glycemic index (HGI) or low glycemic index (LGI) diet for until their age of 12 weeks. Then the subjects were scarified and their plasma, serum, and muscle samples were collected. RESULTS-The study revealed that HGI diets fed rats had higher plasma cholesterol and Leptin (LGI Leptin 1.34 +/- 0.13ng/ml, HGI Leptin 2.12 +/- .20ng/ml) concentrations. It also found the liver and muscle glycogen storage in LGI diets showed higher level (LGI-liver 108 +/-3.0 mg/100g, LGI-muscle 22.6+/- 2.3g/100g) than that of HGI (HGI-liver 96 +/- 2.0mg/100g, HGI-muscle 18+/- 1.5g/100g) diets. CONCLUSION : the long term feeding of LGI carbohydrate encourages more glycogen storage while HGI increases fat deposition. Consumption of LGI diets has an advantage over HGI diets of higher physical activity while elevating glycogen storage and reducing chances of obesity.
Field of Research
110102 Medical Biochemistry: Carbohydrates
Socio Economic Objective
HERDC Research category
E2.1 Full written paper - non-refereed / Abstract reviewed