Effects of Diet, Chronic Inactivity, and Exercise on Growth Performance and Dehydrogenase Activities in Hepatic and Adipose Tissues

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Abstract
The effects of diet quality, chronic inactivity, and forced exercise on the growth performance of rats and levels of glucose 6-phosphate dehydrogenase (glucose-6-P dehydrogenase) and 6-phosphogluconate dehydrogenase (6-P-gluconate dehydrogenase) activities in hepatic and adipose tissues were investigated. The mean body weights of the restricted activity rats were significantly lower irrespective of diet quality. Diet quality also significantly influenced the growth as well as the activities of glucose-6-P dehydrogenase and 6-P-gluconate dehydrogenase. The dehydrogenase activities were significantly higher in the tissues of rats fed a diet high in carbohydrate than those fed diets high in protein or fat. The levels of adipose glucose-6-P dehydrogenase or 6-P-gluconate dehydrogenase were increased by the chronic inactivity in rats fed the high fat diet. Forced exercise however, significantly decreased the adipose and hepatic glucose-6-P dehydrogenase particularly when the exercise preceded the feeding period.