Investigation of diurnal variation in sustained exercise performance

摘要

Human performance generally varies in phase with the circadian curve in body temperature. This relationship between performance and core body temperature may be disrupted when exercise causes a pronounced rise in body temperature. In this study the authors compared responses to exercise in the morning and in the evening when pre-exercise body temperature differed significantly. Rectal temperature was measured pre-exercise and throughout a cycle ergometer test at 70/100 VO_2 max in seven males (aged 19-24 years).