Abstract
Purpose
Cancer-related fatigue (CRF) is a common and limiting symptom reported by survivors of cancer, negatively impacting health-related quality of life (HRQoL). Exercise improves CRF, HRQoL, and physical fitness in survivors. Prospective research trials have shown that exercise-associated fitness improvements effects on HRQoL are mediated by CRF; however, this has not been investigated in a pragmatic real-world setting. This study utilizes data from a large heterogenous population of survivors participating in a clinical exercise program to investigate this mediation effect, as well as effects of program attendance.
Methods
Data were collected from 194 survivors completing the BfitBwell Cancer Exercise Program (July 2016–February 2020). Changes in HRQoL, CRF, and fitness were calculated and program attendance collected. Basic correlation analyses were performed. Linear regression analyses were performed to assess mediation by CRF.
Results
All measures of CRF, HRQoL, and physical fitness significantly improved following the exercise program. Improvements in physical fitness were significantly correlated with improvements in HRQoL (r = 0.15–0.18), as was program attendance (r = 0.26) and CRF (r = 0.59). The effects of physical fitness and program attendance on HRQoL were at least partially mediated by the effects of CRF.
Conclusion
This study extends research findings on how exercise programs improve HRQoL in survivors of cancer to a real-world setting. Results indicate that clinical exercise programs should target reductions in CRF in survivors (during or after treatment) through improvements in physical fitness to improve HRQoL and that high attendance should be encouraged regardless of fitness changes.
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Acknowledgements
The authors acknowledge Nicole Gleason, Rebecca Kienitz, Jared Scorsone, and Ian Moran for assistance with recruitment, scheduling, and exercise delivery
Funding
REDCap use is supported by NIH/NCRR Colorado CTSI Grant Number UL1 TR002535. DMO was supported by F32DK122652.
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All authors contributed to study conception and design. Material preparation and data collection and analysis were performed by RJM and DMO. The first draft of the manuscript was written by RJM and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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Collection and use of clinical program data was approved by the Colorado Multiple Institutional Review Board (COMIRB).
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Data used in this study were collected only from individuals who provided written informed consent for their clinical program data to be used in future research.
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Marker, R.J., Ostendorf, D.M., Leach, H.J. et al. Cancer-related fatigue mediates the relationships between physical fitness and attendance and quality of life after participation in a clinical exercise program for survivors of cancer. Qual Life Res 31, 3201–3210 (2022). https://doi.org/10.1007/s11136-022-03173-4
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DOI: https://doi.org/10.1007/s11136-022-03173-4