Comparison between short-term food restriction and exercise on whole body glucose disposal in high-fat rats.

S. Sakamoto, T. Muto, M. Yokota, N. Ishimura, Y. Niwa, N. Harada, K. Okada, Y. Nakaya

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

High-fat diets induce whole-body insulin resistance. The aim of this study was to compare effect of two interventions: 3-day food restriction (66% of ad libitum fed) and 3-day exercise training (voluntary running wheels), on decreased insulin-mediated whole body glucose uptake in high-fat fed rats (5 mo old) using the hyperinsulinemic euglycemic clamp procedure. The control group was maintained on rat chow alone. After high-fat feeding for 2 wk, insulin-stimulated whole body glucose utilization was significantly decreased by 26%. The exercise training was more effective than food restriction in lowering plasma concentrations of insulin and triacylglycerol and tissue concentrations of triacylglycerol in soleus muscles. Diminished whole-body glucose uptake resulting from high-fat feeding was reversed completely by exercise training, but only partially by food restriction. The time course of starvation on insulin-stimulated glucose uptake was also observed in high-fat fed rats. Although the extension of starvation time to 48 h resulted in decreased plasma glucose, insulin and triacylglycerol concentrations, whole body glucose uptake did not increase further. These findings suggest that short-term exercise has a higher restorative effect on insulin sensitivity in high-fat fed rats than food restriction, in spite of the same loss in body weight, presumably due in part to improved local lipid availability.

Original languageEnglish
Pages (from-to)138-144
Number of pages7
JournalJournal of Medical Investigation
Volume47
Issue number3-4
Publication statusPublished - 08-2000
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Biochemistry, Genetics and Molecular Biology(all)

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