L-citrulline reduces time to exhaustion and insulin response to a graded exercise test.

Purpose: Oral L-arginine supplementation has been shown to improve treadmill time to exhaustion and resting insulin sensitivity in individuals with peripheral vascular disease and type 2 diabetes, respectively. Furthermore, L-citrulline supplementation increases plasma L-arginine concentration to a level higher than that achieved by oral L-arginine supplementation. The purpose of this investigation was therefore to determine whether time to exhaustion during a graded treadmill test, as well as plasma insulin and glucose profiles, could be improved with oral L-citrulline supplementation in healthy individuals.

Relations of women exercisers' mastery and performance goals to traits, fitness, and preferred styles of instructors.

This study addressed the influence of both mastery and performance goals of 144 women (M=21.8 yr.) exercising at a campus fitness center.