Exercise interventions improve sleep quality in breast cancer survivors
A meta-analysis of 31 randomized controlled trials found that exercise interventions significantly improve sleep quality in breast cancer survivors (Hedges' g = -0.63, 95% CI -0.80 to -0.46, P = 0.00). Subgroup analyses suggested larger effects for yoga, sessions of 60 minutes, three times per week, and interventions lasting more than 12 weeks, with comparable effects for group and individual formats.
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Exercise interventions improve sleep quality in breast cancer survivors The current body of evidence comprises 1 study and 1 meta-analysis. EvidenceHub rates the overall confidence at 49/100 (low).
The Claim
Exercise interventions improve sleep quality in breast cancer survivors
This conclusion is most relevant to: Breast cancer survivors (postoperative).
What the Research Shows
The conclusion draws on 1 linked study. Highlights from the cited literature:
- ▸Effects of exercise interventions on sleep quality in breast cancer survivors: a systematic review and meta-analysis. (Frontiers in oncology, 2026) —
How It Works
The proposed biological pathway:
- ▸Exercise may reduce inflammation and stress hormones
- ▸Exercise may improve mood and reduce anxiety/depression
- ▸Exercise may regulate circadian rhythms and body temperature
- ▸Result: Improved sleep quality
Who Might Benefit
Evidence fit by population:
- ▸Breast cancer survivors (postoperative)
Recommended Dose
Optimal dose not established; exploratory findings suggest 60 min/session, 3 times/week, >12 weeks
Limitations & Caveats
Important context when interpreting this evidence:
- ▸Subgroup analyses were exploratory and not based on direct comparisons, so no definitive optimal prescription
- ▸Potential publication bias and heterogeneity across studies not fully addressed in abstract
- ▸Only abstracts of included studies may have been assessed; risk of bias details not fully reported
Frequently Asked Questions
What types of exercise were included in this meta-analysis?▼
The meta-analysis included various exercise interventions, with yoga being one of the most effective subtypes. Other types likely included aerobic, resistance, and combined exercises.
How much exercise is recommended for improving sleep in breast cancer survivors?▼
While the optimal prescription is not established, exploratory subgroup analyses suggested that yoga performed three times per week for 60 minutes per session for more than 12 weeks yielded the largest effect sizes.
Is group exercise as effective as individual exercise for sleep quality?▼
Yes, the effect sizes were comparable between group (g = -0.65) and individual (g = -0.60) interventions, suggesting both formats are beneficial.
What was the overall effect size of exercise on sleep quality?▼
The overall effect size was g = -0.63 (95% CI -0.80 to -0.46), indicating a moderate improvement in sleep quality.
References
- 1.Yu H, Zhong J, Chen S, Li M, Guo J. “Effects of exercise interventions on sleep quality in breast cancer survivors: a systematic review and meta-analysis..” Frontiers in oncology, 2026. PMID: 42676424 DOI: 10.3389/fonc.2026.1860273