Role of Growth Hormone in Lipid Mobilization Stimulated by Prolonged Muscular Exercise in the Rat

Abstract

The effects of prolonged muscular exercise (swim in tepid water for 60 min) on blood glucose, plasma FFA and R-GH were studied in a group of normal rats and the effect on blood glucose and plasma FFA in a group of hypophysectomized rats. The data obtained showed that, whereas in normal rats plasma FFA rose after muscular exercise, plasma R-GH fell sharply. In Hypophysectomized rats, however, muscular exercise did not increase plasma FFA levels. It is concluded that GH release does not stimulate the exercise-induced lipid mobilization in the rat. 1 Research supported in part by the grant No. 74. 00134. 04 115 1187 of Consiglio Nazionale delle Ricerche.