High or increasing levels of physical activity protect women from future insomnia

Publication date: Available online 7 June 2016
Source:Sleep Medicine
Author(s): Søren Spörndly-Nees, Pernilla Åsenlöf, Eva Lindberg
ObjectiveThere is a lack of evidence about the impact of physical activity on insomnia based on representative samples with a long-term follow-up. The aim of this study was to assess the impact of physical activity on insomnia incidence, as well as the impact of changes in leisure-time physical activity on insomnia in women.MethodThe study included a population-based sample of 5,062 women aged >20 years who responded to questionnaires in 2000 and 2010. Insomnia was defined as severe or very severe problems falling asleep, maintaining sleep, or experiencing early morning awakenings, together with daytime sleepiness or fatigue. Physical activity was categorized as low, medium, or high level at baseline and at follow-up.ResultsAfter adjusting for age, body mass index, smoking, alcohol dependence, snoring status, level of education, and psychological distress, the adjusted odds ratio (OR) (95% confidence interval) for incident insomnia in women increasing from a low to a medium or high level of physical activity was 0.53 (0.3−0.94) and 0.17 (0.03−0.81) respectively, as compared to women with a low activity level on both occasions. Women remaining on a medium activity level or increasing to a high activity level had an OR of 0.53 (0.35−0.83) and 0.36 (0.21−0.64) and the OR of those decreasing from a high level to a medium level or remaining on a high activity level on both occasions was 0.37 (0.21−0.66) and 0.3 (0.16−0.54) respectively.ConclusionWomen maintaining higher levels or increasing their level of leisure-time physical activity over the 10-year period were partly protected from self-reported insomnia.



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