The Effect of Overnight Sleep Deprivation after Competitive Rugby League Matches on Postmatch Physiological and Perceptual Recovery

Melissa Skein, Rob Duffield, Geoffrey M. Minett, Alanna Snape, Alistair Murphy
2013 International Journal of Sports Physiology and Performance  
Word Count: 250 23 Text-Only Word Count: 4198 24 Number of Figures: 2 25 Number of Tables: 3 26 ABSTRACT 1 Purpose: This study examined the effects of overnight sleep deprivation on recovery 2 following competitive rugby league matches. 3 Methods: Eleven male, amateur rugby league players performed two competitive matches, 4 followed by either a normal night's sleep (~8h; CONT) or a sleep deprived night (~0h; 5 SDEP) in a randomised fashion. Testing was conducted the morning of the match, and 6
more » ... immediately post-match, 2h post and the next morning (16h post-match). Measures included 7 counter-movement jump (CMJ) distance, knee extensor maximal voluntary contraction 8 (MVC), voluntary activation (VA), venous blood creatine kinase (CK) and C-reactive protein 9 (CRP), perceived muscle soreness and a word-colour recognition cognitive function test. 10 Percent change between post-and 16h post-match was reported to determine the effect of the 11 intervention the next morning. 12 Results: Large effects indicated a greater post-to 16h post-match percentage decline in CMJ 13 distance following SDEP compared to CONT (P=0.10-0.16; d=0.95-1.05). Similarly, the 14 percentage decline in incongruent word-colour reaction times were increased in SDEP trials 15 (P=0.007; d=1.75). Measures of MVC did not differ between conditions (P=0.40-0.75; 16 d=0.13-0.33), though trends for larger percentage decline in VA were detected in SDEP 17 (P=0.19; d=0.84). Further, large effects indicated higher CK and CRP responses 16h post-18 match during SDEP compared to CONT (P=0.11-0.87; d=0.80-0.88). 19 Conclusions: Sleep deprivation negatively affected recovery following a rugby league 20 match, specifically impairing CMJ distance and cognitive function. Practitioners should 21 promote adequate post-match sleep patterns or adjust training demands the next day to 22 accommodate the altered physical and cognitive state following sleep deprivation. 23 24
doi:10.1123/ijspp.8.5.556 fatcat:27cuq3gzz5hr7gmjqgnjuvb7oi