Does Exercise Improve Progression-free Survival in Glioblastoma? A Prospective Single Arm Intervention Trial

Background: Glioblastoma (GBM) is the most common malignant glioma in adults, with a very poor prognosis, limited new treatment options, and neurological sequelae, including physical and cognitive decline that adversely affect quality of life (QOL). Physical activity may be an intervention that attenuates the cognitive and physical decline associated with GBM. However, few studies examine physical activity in brain tumor patients, perhaps due to challenges in trial design, measuring outcomes, and complexity of care. Aims of this work are to develop and implement an individualized exercise intervention for GBM patients to support functional independence, and to delay tumor progression and cognitive decline. Methods: GBM patients scheduled to be treated with concurrent radiation and chemotherapy will be recruited from the neuro-oncology clinic at the Princess Margaret Cancer Centre. Participants will receive an individualized, home-based exercise program that includes aerobic and resistance training, tailored to prior level of fitness, current physical status, and individual interests. They will undergo 1-hr standardized, validated assessments of physical and neurocognitive functions, mood, fatigue, and QOL, prior to radiation, and then 3, 6, 12, and 18 months later. Significance: Identifying interventions that preserve or improve mobility and cognitive function will enhance QOL and may lengthen progression-free survival in brain tumor patients. Moreover, finding ways to help patients maintain self-care will lessen the strain on the health care system (e.g., fewer hospitalizations, delayed utilization of palliative care hospice).