A primed constant infusion of [15N2]urea was used to quantify the response of urea production to exercise at 40 and 70% maximal oxygen consumption on a treadmill. Total urea production, urea production from recycled N, urea production from nonrecycled N, and urea N recycled back into body protein were calculated. Most components of urea kinetics were unaffected by exercise at either intensity. The rate of urea reincorporated into protein was significantly increased during exercise and recovery at both levels of exercise. We conclude that exercise does not stimulate urea production but that there may be an accelerated reincorporation of urea N back into body protein.

Carraro, F., KIMBROUGH T., D., & Wolfe, R.R. (1993). Urea kinetics in humans at two levels of exercise intensity. JOURNAL OF APPLIED PHYSIOLOGY, 75(3), 1180-1185.

Urea kinetics in humans at two levels of exercise intensity

CARRARO, FABIO;
1993

Abstract

A primed constant infusion of [15N2]urea was used to quantify the response of urea production to exercise at 40 and 70% maximal oxygen consumption on a treadmill. Total urea production, urea production from recycled N, urea production from nonrecycled N, and urea N recycled back into body protein were calculated. Most components of urea kinetics were unaffected by exercise at either intensity. The rate of urea reincorporated into protein was significantly increased during exercise and recovery at both levels of exercise. We conclude that exercise does not stimulate urea production but that there may be an accelerated reincorporation of urea N back into body protein.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11365/8359
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