مرکز منطقه ای اطلاع رساني علوم و فناوري - The Effect of Diurnal Variation on Young Athletes Recovering from High-Intensity Exercises

Abstract :

This study examines the effect of diurnal variation on the recovery of young athletes following high-intensity exercise. Twenty-seven male athletes with at least 2 years of training experience participated in this study. Anaerobic performance was assessed at five different times of day (08:^00- 09:^00;10:^00-11:^00;12:^00-13:^00;15:^00-16:^00;17:^00-18:^00) using the Wingate Test (WAnT) with each test performed on a different day. The heart rate (HR), oxygen consumption (VO2), body temperatures and mean arterial blood pressure values were also recorded while at rest, during WAnT and during the 21- minutes of recovery period. Repeated ANOVA test results showed the HR and body temperature responses to WAnT were significantly lower in the morning than in the early-evening (p 0.05). Both anaerobic performance, the resting, and most of the recovery values did not vary significantly between different times of day (p 0.05). However, when mean values were considered, anaerobic performance, the resting and recovery values of HR, VO2 and body temperature were slightly lower in the morning than in the early evening. Moreover, the recovery rates of HR were slightly higher in the morning. In conclusion, it was shown that high-intensity exercise performance tended to be higher in the early evening hours, but that the rate of recovery from high-intensity exercise tended to be higher in the morning hours.