Objective Physical Activity Impacts Sleep Variables

Physical activity inversely tied to daytime overly sleepiness, concentration problems when tired

WEDNESDAY, Nov. 30 (HealthDay News) -- Objectively-measured physical activity is significantly associated with sleep-related parameters in adults of all ages, according to a study published in the December issue of Mental Health and Physical Activity.

Paul D. Loprinzi, from the Donna & Allan Lansing School of Nursing & Health Sciences in Louisville, Ky., and Bradley J. Cardinal, from Oregon State University in Corvallis, investigated the association between objectively-measured physical activity and a variety of self-reported sleeping parameters, among a nationally representative cohort of 3,081 U.S. adults ranging in age from 18 to 85 years. Analyses were based on data from the National Health and Nutrition Examination Survey of 2005 to 2006. Participants were examined at a mobile examination center, following which, they were instructed to wear an ActiGraph 7164 accelerometer on their right hip for one week. Household interviews were conducted to obtain information regarding sleep.

The investigators found that, after controlling for confounding variables, the relative risk of frequently versus never feeling overly sleepy during the day decreased by a factor of 0.65 for individuals who met prespecified physical activity guidelines, versus those not meeting the guidelines. The prevalence of leg cramps while sleeping, and difficulty in concentrating when tired, showed similar trends.

"Objectively-measured physical activity was associated with several self-reported sleeping-related parameters," the authors write.

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