Moderate- to high-intensity physical activity was associated with improved sleep health outcomes in cancer survivors, supporting 'the role of moderate- to high-intensity physical activity in improving sleep health in a diverse cancer survivor population.'
Key Findings
Results
Cancer survivors meeting ACS physical activity guidelines reported significantly lower Insomnia Severity Index scores than inactive participants.
Data drawn from the Detroit Research On Cancer Survivors (ROCS) cohort with n = 3022 participants who completed the supplemental sleep survey at baseline and/or follow-up.
ISI scores were 4.5 for active participants versus 5.9 for inactive participants (p < 0.001).
Physical activity guidelines used were the 2012 American Cancer Society (ACS) guidelines for moderate- to high-intensity physical activity.
ISI (Insomnia Severity Index) was one of three sleep health instruments used in the study.
Results
Cancer survivors meeting ACS physical activity guidelines reported significantly lower Epworth Sleepiness Scale scores than inactive participants.
ESS scores were 5.6 for active participants versus 6.6 for inactive participants (p < 0.001).
The Epworth Sleepiness Scale (ESS) measures daytime sleepiness.
Analysis was conducted in the Detroit ROCS cohort (n = 3022).
Results
Cancer survivors meeting ACS physical activity guidelines reported significantly lower Pittsburgh Sleep Quality Index scores than inactive participants.
PSQI scores were 6.3 for active participants versus 7.9 for inactive participants (p < 0.001).
The Pittsburgh Sleep Quality Index (PSQI) is a measure of overall sleep quality.
Analysis was conducted in the Detroit ROCS cohort (n = 3022).
Results
Participation in a HIIT-based exercise trial (CAPABLE) was associated with a significant improvement in insomnia severity among cancer survivors.
The CAPABLE (CrossFit And Physical Activity: A Better Life Experience) High-Intensity Interval Training trial included n = 73 participants.
ISI scores improved from 4.5 at baseline to 3.4 at exit (p < 0.001).
The CAPABLE trial represents an interventional study design, in contrast to the observational ROCS cohort.
Results
PSQI scores showed only modest, non-significant improvement following the CAPABLE HIIT intervention.
PSQI scores decreased from 6.1 at baseline to 5.4 at exit in the CAPABLE trial (p = 0.063).
The improvement did not reach conventional statistical significance (p < 0.05).
This contrasts with the significant ISI improvement observed in the same trial.
Results
Daytime sleepiness as measured by the ESS did not change significantly following the CAPABLE HIIT intervention.
ESS scores were 5.4 at baseline and 5.2 at exit in the CAPABLE trial (p = 0.708).
This finding contrasts with the cross-sectional ROCS cohort, where active participants had significantly lower ESS scores than inactive participants.
The CAPABLE trial included n = 73 cancer survivors.
Background
Sleep disturbances are common among cancer survivors and negatively impact quality of life.
The study identifies sleep disturbances as a significant concern for the cancer survivor population.
Regular moderate- to high-intensity physical activity is proposed as 'a cost-effective, low-risk alternative strategy to improve sleep.'
Two distinct study designs (a cohort study and a clinical trial) were used to evaluate this relationship.
Methods
The study utilized two distinct datasets to evaluate the association between physical activity and sleep health in cancer survivors.
The Detroit ROCS cohort (n = 3022) provided observational, cross-sectional and longitudinal data.
Sleep health was assessed using three validated instruments: the Insomnia Severity Index (ISI), Pittsburgh Sleep Quality Index (PSQI), and Epworth Sleepiness Scale (ESS).
The study population was described as a 'diverse cancer survivor population.'
What This Means
This research suggests that cancer survivors who engage in moderate to high levels of physical activity tend to sleep better than those who are inactive. Using data from over 3,000 cancer survivors in a Detroit-based cohort study, the researchers found that survivors who met recommended physical activity guidelines scored significantly better on three different measures of sleep quality — experiencing less insomnia, less daytime sleepiness, and better overall sleep quality — compared to survivors who were inactive.
The study also looked at what happened when cancer survivors participated in a structured high-intensity interval training (HIIT) program called CAPABLE. Among the 73 participants in that trial, insomnia scores improved significantly after completing the program. Sleep quality scores also improved slightly, though not enough to be statistically conclusive, and daytime sleepiness scores did not change. Together, these two approaches — one observational and one interventional — both point toward physical activity playing a beneficial role in sleep for cancer survivors.
This research matters because sleep problems are very common after a cancer diagnosis and can seriously affect quality of life. Finding that a non-drug approach like exercise may help is meaningful, especially since it is relatively low-cost and low-risk. The authors note that future work should focus on refining exercise programs to maximize sleep benefits and on finding better ways to help more cancer survivors adopt and stick with physical activity guidelines.
Markey G, Ruterbusch J, Baird T, Martin J, Schwartz A, Finlay D, et al.. (2026). The Impact of Moderate to High Intensity Physical Activity on Sleep Health in Cancer Survivors.. Cancer medicine. https://doi.org/10.1002/cam4.71546