Effect of L-Carnitine Supplementation on Muscle and Blood Camitine Content and Lactate Accumulation during High-Intensity Sprint Cycling

Author:

Barnett Christopher,Costill David L.,Vukovich Mathew D.,Cole Kevin J.,Goodpaster Bret H.,Trappe Scott W.,Fink William J.

Abstract

This study examined the effects of 14 days of L-camitine supplementation on muscle and blood camitine fractions, and muscle and blood lactate concentrations, during high-intensity sprint cycling exercise. Eight subjects performed three experimental trials: control 1 (CON I, Day 0), control I! (CON II, Day 14), and L-camitine (L-CN, Day 28). Each trial consisted of a 4-rain ride at 90%, followed by a rest period of 20 min, and thee five repeated 1-min rides at 115%(2 min rest between each). Following CON n, all subjects began dietary supplementation of L-camitine for a period of 14 days (4 g/day). Plasma total acid soluble and free camitine concentrations were significantly higher (p< .05) at all time points following supplementation. L-camitine supplementation had no significant effect on muscle camitine content and thus could not alter lactate accumulation during exercise.

Publisher

Human Kinetics

Subject

Public Health, Environmental and Occupational Health,Endocrinology,Medicine (miscellaneous),Food Science

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