Introduction: The aim of this study was to investigate the effects of sleep deprivation on the responses of cortisol and testosterone, anaerobic performance indices and blood lactate in active men. For this purpose we used active healthy subjects of physical education field with an average age of 23 ± 2.25 Height 174.5 ± 1.1 and the weight of 69.5 ± 7.8.

Materials & methods: sleep deprivation was a night that was applied by reading, playing chess, computer game and so on. Cortisol and testosterone were measured by Liaison kit mad in England. Performance indicies were measured using the maximum Wingate anaerobic power test and blood lactate were measured using lactometer at the time of fasting, before, immediately and after the 5 minutes of anaerobic test. Data analysis using dependent and independent t test were evaluated.

Findings: The results indicated that sleep deprivation than sleep leaded to significant increase in cortisol (p=0.03) and significant decrease in testosterone (p=0.01). The results showed that sleep than sleep deprivation don’t have significant differences in the performance of anaerobic power and fatigue index (p= 0.06, 0.11, 0.21) although a slight improvement in performance parameters of anaerobic power during sleep was observed. Blood lactate concentration at the time immediately after the Wingate test in sleep phase than full and partial sleep deprivation showed a significant reduction (p=0.02). At other times of rest, before and 5 minutes after the Wingate test, no significant changes (p= 0.061, 0.053, 0.61) were observed.

Discussion & conclusions: Results of this study demonstrated that sleep deprivation didn’t have significant effects on reducing the anaerobic performance and fatigue in active subjects, but concentration lactate showed significant increase after sleep deprivation and after anaerobic exercise than sleep stage. These hormonal changes may be due to stress-induced sleep deprivation and sports activities.