Abstract
The present study aimed to investigate the effects of 20-min (N20) and 90-min (N90) nap opportunities after partial-sleep-deprivation (PSD) on the hematological and biochemical responses to repeated-sprint exercise. Nine male judokas randomly performed, in a counterbalanced order, the running-based anaerobic sprint test (RAST) in three occasions (i.e., after no-nap, N20 or N90) following PSD. During each session, total blood count, plasma ions and biomarkers of muscle damage were collected before and after the RAST. Both nap opportunities enhanced repeated-sprint performance, and N90 resulted in higher enhancement. N90 resulted in higher post-exercise Monocytes (MO) (p<0.001; d=1.51), Lymphocytes (LY) (p<0.001; d=0.61), Hemoglobin (HB) (p<0.001; d=1.09), Hematocrit (HT) (p<0.001; d=0.9), Sodium (p<0.001; d=1.01) and Potassium (p<0.001; d=9.54) in comparison with no-nap. However, N20 increased MO, LY, platelet and mean corpuscular hemoglobin and decreased mean corpuscular volume. Strong correlations were found between mean and minimal power and LY (p<0.001, r=0.53; r=0.55), HB (p<0.001, r=0.58; r=0.56) and HT (p<0.001, r=0.58; r=0.61), respectively. There was no significant effect of napping on muscle damage. Therefore, napping improved repeated-sprint performances and associated hematological and biochemical responses after PSD.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
