PMID: 2495344Apr 1, 1989Paper

Exercise training and dietary chromium effects on glycogen, glycogen synthase, phosphorylase and total protein in rats

The Journal of Nutrition
W W CampbellR A Anderson

Abstract

The effects of exercise training and dietary chromium intake on rat liver and muscle glycogen metabolism, tissue and body weight and feed consumption were examined. After 16 wk of training, liver, gastrocnemius and biceps femoris glycogen concentrations were higher in the trained compared to sedentary groups, independent of dietary chromium. There was a chromium x training interaction on glycogen synthase activities in the liver and gastrocnemius muscle. Liver glycogen phosphorylase activities (expressed per g liver) were lower in the chromium-supplemented rats as compared to the non-supplemented rats after 5 wk of dietary treatment, but were similar after 8 wk and higher after 18 wk. Gastrocnemius phosphorylase activity (expressed per mg protein) was lower in the trained rats as compared to the sedentary rats after 16 wk, independent of dietary chromium. Biceps femoris phosphorylase activities were not altered due to training or dietary chromium. Total protein concentration increased in the liver but decreased in the gastrocnemius due to dietary chromium. In summary, liver glycogen synthase and phosphorylase activities were dependent upon dietary chromium. Dietary chromium altered gastrocnemius synthase, but not phosphorylase ...Continue Reading

Citations

Dec 25, 2004·Experimental Biology and Medicine·Masashi MorifujiKatsumi Sugiura
Nov 1, 1995·Biological Trace Element Research·R A Anderson, M M Polansky

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