Sleep Restriction in Elite Soccer Players: Effects on Explosive Power, Wellbeing, and Cognitive Function

Purpose: To investigate the cognitive, physical, and perceptual effects of sleep restriction (SR) in soccer players following a night match.Methods: In a crossover design, nine male soccer players from the English Premier League 2 (age, 21 +/- 5 years; height, 1.80 +/- 0.75 m; body mass, 74.2 +/- 6.8 kg) recorded their sleep quality and quantity with sleep logs and a subjective survey after two night matches (19:00); one where sleep duration was not altered (CON) and one where sleep was restricted by a later bed-time (SR). Countermovement jump height (CMJ), subjective wellbeing (1-5 likert scale for mood, stress, fatigue, sleep, and soreness), and cognitive function were measured at baseline and the morning following the match (+12 h; M + 1).Results: Bed-time was later in SR than CON (02:36 +/- 0.17 vs. 22:43 +/- 29; P= .0001; eta p(2) = 0.999) and sleep duration was shorter in SR than CON (5.37 +/- 0.16 vs. 8.59 h +/- 0.36;P= .0001; eta p(2) = 0.926). CMJ decreased by similar to 8% after the match in both SR and CON (P= .0001; eta p(2) = 0.915) but there were no differences between the conditions (P> .05; eta p(2) = 0.041-0.139). Wellbeing was rated worse after both matches (P= .0001; eta p(2) = 0.949) but there were no differences between the trials (P> .05; eta p(2) = 0.172-257). SR did not influence cognitive function (P> .05; interaction effects, eta p(2) = 0.172-257).Conclusion: SR following a nighttime soccer match does not impair CMJ performance, subjective wellbeing, or cognitive function the following morning.