Abstract
Introduction
Physical activity interventions can improve sleep quality in breast cancer survivors. This paper examines the effects of the ACTIVATE Trial, a wearable-based physical activity intervention (Garmin Vivofit2® coupled with behavioral feedback, goal setting, and health coaching) on sleep outcomes.
Methods
Post-primary treatment, inactive, postmenopausal breast cancer survivors were recruited and randomized to primary intervention or waitlist. Wrist-worn actigraphy (sleep onset latency, SOL; total sleep time, TST; sleep efficiency, SE; wake after sleep onset, WASO; and number of awakenings, NWAKE) and questionnaire-derived sleep measures (Pittsburgh Sleep Quality Index) were assessed at baseline (T1), 12 weeks (end of primary intervention and start of waitlist intervention, T2), and at 24 weeks (T3).
Results
Eighty-three women (mean age = 62 years) were randomized; trial retention was 94% at T2 and 87% at T3. At T2, primary intervention participants had greater improvements in WASO (− 5.7 min, 95% CI − 11.7 to − 0.2) and NWAKE compared with the waitlist arm (− 2.0, 95% CI − 3.6 to − 0.4). At T3, within-group improvements were observed for SE (both groups), WASO (both groups), NWAKE (primary intervention group only), total PSQI score (primary intervention group), and sleep efficacy (primary intervention group).
Conclusions
The intervention reduced actigraphy-measured sleep disturbances. Within-group analyses suggest that improvements in sleep quality are sustained over a longer duration, and there may be similar benefits from an abridged intervention (wearable device only). Actigraphy-measured effects appeared stronger in participants who were poor sleepers at study entry.
Implications for Cancer Survivors
Wearable technology can increase physical activity and improve sleep for breast cancer survivors.
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Acknowledgments
This research was supported by Register4 through its members’ participation in research and/or provision of samples and information. Thanks also to the National Breast Cancer Foundation, the Breast Cancer Network of Australia, and Counterpart for their promotion of the ACTIVATE Trial and assistance with recruitment.
Funding
This work was enabled by a grant from the World Cancer Research Fund International (2015/1397). Vallance was supported by the Canada Research Chairs program; Buman was supported by an Endeavour Research Fellowship from the Department of Education and Training of the Australian Government (6316 – 2018); Boyle was supported by a National Health and Medical Research Council Early Career Fellowship (1072266); Lynch was supported by a National Breast Cancer Foundation Fellowship (ECF-15-012).
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The ACTIVATE Trial protocol was approved by Cancer Council Victoria’s Human Research Ethics Committee (HREC-1602) and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
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Informed consent was obtained from all individual participants included in the study.
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Nguyen, N.H., Vallance, J.K., Buman, M.P. et al. Effects of a wearable technology-based physical activity intervention on sleep quality in breast cancer survivors: the ACTIVATE Trial. J Cancer Surviv 15, 273–280 (2021). https://doi.org/10.1007/s11764-020-00930-7
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DOI: https://doi.org/10.1007/s11764-020-00930-7