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Increased physical activity improves sleep and mood outcomes in inactive people with insomnia: a randomized controlled trial
Author(s) -
Hartescu Iuliana,
Morgan Kevin,
Stevinson Clare D.
Publication year - 2015
Publication title -
journal of sleep research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.297
H-Index - 117
eISSN - 1365-2869
pISSN - 0962-1105
DOI - 10.1111/jsr.12297
Subject(s) - actigraphy , insomnia , mood , medicine , randomized controlled trial , physical therapy , anxiety , depression (economics) , physical activity , psychiatry , economics , macroeconomics
Summary While high levels of activity and exercise training have been associated with improvements in sleep quality, minimum levels of activity likely to improve sleep outcomes have not been explored. A two‐armed parallel randomized controlled trial ( N =41; 30 females) was designed to assess whether increasing physical activity to the level recommended in public health guidelines can improve sleep quality among inactive adults meeting research diagnostic criteria for insomnia. The intervention consisted of a monitored program of ≥150 min of moderate‐ to vigorous‐intensity physical activity per week, for 6 months. The principal end‐point was the Insomnia Severity Index at 6 months post‐baseline. Secondary outcomes included measures of mood, fatigue and daytime sleepiness. Activity and light exposure were monitored throughout the trial using accelerometry and actigraphy. At 6 months post‐baseline, the physical activity group showed significantly reduced insomnia symptom severity ( F 8,26 = 5.16, P = 0.03), with an average reduction of four points on the Insomnia Severity Index; and significantly reduced depression and anxiety scores ( F 6,28 = 5.61, P = 0.02; and F 6,28 = 4.41, P = 0.05, respectively). All of the changes were independent of daily light exposure. Daytime fatigue showed no significant effect of the intervention ( F 8,26 = 1.84, P = 0.18). Adherence and retention were high. Internationally recommended minimum levels of physical activity improve daytime and night‐time symptoms of chronic insomnia independent of daily light exposure levels.