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document
The effects of moderate to vigorous aerobic exercise on the sleep need of sedentary young adults . Exercise has been recommended for enhancing sleep ; a claim linked to the belief that sleep need - defined by sleep duration and depth - is increased post-exercise to allow tissue recovery . Objective studies investigating exercise-sleep responses have produced mixed outcomes , and the disparity in results between studies may be due to differences in individual characteristics and/or exercise protocol , emphasising the importance of carefully controlled trials . We investigated the role of exercise on the sleep need of sedentary adults , after controlling for exercise mode , timing and duration . Twelve healthy volunteers ( 25.2 ± 4.0 years , 9 females , [ Vdot ] O ( 2 ) max 35.4 ± 8.8 ml· kg ( -1 ) · min ( -1 ) ) were randomised to no-exercise or to a bout of treadmill exercise at 45 % , 55 % , 65 % or 75 % [ Vdot ] O ( 2 ) max in a crossover design . Sleep on no-exercise and exercise nights were assessed by polysomnography . Participants spent a greater proportion of sleep in light sleep ( stage 1 + stage 2 ) after exercise at both 65 % and 75 % [ Vdot ] O ( 2 ) max ( P < 0.05 ) than the no-exercise condition . There was a trend of a reduced proportion of rapid eye movement sleep with increased exercise intensity ( P = 0.067 ) . No other changes were observed in any other sleep variables . Two findings emerged : vigorous exercise did not increase sleep need ; however , this level of exercise increased light sleep .
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Intervention_Physical
moderate to vigorous aerobic exercise
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Intervention_Physical
Exercise
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Intervention_Physical
exercise
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Intervention_Physical
exercise
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Participant_Condition
sleep need of sedentary young adults .
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Participant_Condition
sedentary adults