The effects of acute and chronic exercise on sleep. A meta-analytic review.
Level 1 - systematic review of randomized trials
Meta-analysis of studies evaluating the effects of acute and chronic exercise on sleep parameters.
PubMed 8726346 · doi:10.2165/00007256-199621040-00004
What was done
The authors conducted a meta-analysis of studies examining the effects of acute and chronic exercise on sleep outcomes to resolve conflicting findings in prior literature. The review analyzed overall sleep effects and examined moderating variables—specifically focusing on stage 4 sleep and rapid eye movement (REM) sleep—including participant characteristics (sex, age, fitness level) and exercise parameters (timing, modality, duration).
What was found
The abstract reports no numerical values, effect sizes, or confidence intervals. Directionally, acute and chronic exercise increased slow wave sleep (SWS) and total sleep time, while decreasing sleep onset latency and REM sleep. These effects were moderated by individual characteristics (age, sex, fitness) and exercise features (type, duration, and time of day completed).
Why it matters
This review helps reconcile earlier inconsistent literature by demonstrating consistent beneficial shifts in sleep architecture (higher slow-wave sleep, lower onset latency) associated with exercise, while identifying key moderating variables.
Limits
The abstract does not disclose the total number of included studies, total participant sample size, or quantitative effect sizes and variance. Details regarding study quality, control conditions, and potential publication bias are not provided in the abstract.
Cited by
- supports Early research from the 1970s and 1980s investigating the connection between exercise and sleep failed to show a strong connection.