Yoga may help people living well with breast cancer sleep better: one meta-analysis of randomised trials found a small improvement in self-reported sleep quality, but another found no clear effect, and a review of cancer trials found walking improved sleep disturbance more than yoga.
Low certainty
Further research is likely to change this.Who this is about
adults living with breast cancer
Practical note
Graded low: randomised evidence, downgraded for inconsistency between meta-analyses (a 2023 analysis of 12 trials found SMD -0.40, while a 2020 subgroup of 7 trials found SMD -0.15, not significant) and for unblinded self-reported outcomes. In the 2023 analysis, programmes of two or three sessions a week for 6 to 8 weeks showed the clearest effects.
Sources
- Supports “The meta-analysis shows that yoga exercise intervention is effective in improving sleep quality in breast cancer patients [SMD = -0.40, 95% CI: (-0.71, -0.09), P = 0.01]” (Abstract, Results) Zhu J, Chen X, Zhen X, Zheng H, Chen H, Chen H, Liao H, Zhu J, Wang C, Zheng Z, Chen R, Wang Y. 2023. Frontiers in Oncology. Meta-analysis of effects of yoga exercise intervention on sleep quality in breast cancer patients. CC BY 4.0; credit Zhu et al., Frontiers in Oncology 2023; Courtesy of the U.S. National Library of Medicine
- Opposes “Seven RCTs revealed no evidence for effects of yoga compared with the control group in improving sleep quality for women with breast cancer using PSQI (SMD = - 0.15; 95% CI = - 0.31 to 0.01; P = 0.5).” (Abstract, Results) Wang WL, Chen KH, Pan YC, Yang SN, Chan YY. 2020. BMC Psychiatry. The effect of yoga on sleep quality and insomnia in women with sleep problems: a systematic review and meta-analysis. CC BY 4.0; credit Wang et al., BMC Psychiatry 2020; Courtesy of the U.S. National Library of Medicine
- Context “We concluded that walking is more effective than yoga in improving sleep disturbance in cancer patients.” (Abstract) Tang MF, Chiu HY, Xu X, Kwok JY, Cheung DST, Chen CY, Lin CC. 2019. Sleep Medicine Reviews. Walking is more effective than yoga at reducing sleep disturbance in cancer patients: A systematic review and meta-analysis of randomized controlled trials. publisher copyright; metadata and short quotes only; Courtesy of the U.S. National Library of Medicine