Exercise can improve sleep quality: a systematic review and meta-analysis

Area of Science:

• Sleep Medicine
• Exercise Science
• Clinical Research

Background:

• Insomnia is a prevalent sleep disorder affecting sleep quality and daytime functioning.
• Existing systematic reviews have not comprehensively evaluated exercise interventions for primary and secondary insomnia.
• This study addresses the need for evidence on exercise efficacy in insomnia management.

Purpose of the Study:

• To systematically review and meta-analyze the effectiveness of exercise interventions for patients diagnosed with insomnia.
• To assess the impact of exercise on various sleep parameters in individuals experiencing insomnia.
• To evaluate the safety and adverse effects associated with exercise for insomnia.

Main Methods:

• Comprehensive search of multiple electronic databases for randomized controlled trials (RCTs) on exercise and insomnia.
• Inclusion of studies with participants formally diagnosed with insomnia using standard criteria.
• Meta-analysis of outcome data using random-effects models, with quality assessment via Cochrane Risk of Bias and GRADE.

Main Results:

• Nine RCTs involving 557 participants were included in the analysis.
• Exercise demonstrated significant benefits in improving sleep quality as measured by the Pittsburgh Sleep Quality Index and Insomnia Severity Index (low to very low-quality evidence).
• No significant improvement in sleep efficiency was observed (moderate-quality evidence), and adverse effects were infrequently reported. High risk of selection bias was noted in most studies.

Conclusions:

• Exercise appears to be a beneficial intervention for improving subjective sleep quality in individuals with insomnia.
• The current evidence suggests exercise is generally safe, with few reported adverse effects.
• Significant limitations, including a high risk of selection bias in included trials, necessitate further high-quality research to strengthen the evidence base.