Fit for life after cancer: does exercise timing matter?

Area of Science:

• Oncology
• Exercise Science
• Rehabilitation

Background:

• Cancer survivors often experience decreased quality of life (QoL) and increased fatigue.
• Exercise interventions are crucial for managing treatment side effects and improving survivorship.
• Understanding the optimal timing and dosage of exercise is vital for cancer rehabilitation.

Purpose of the Study:

• To evaluate the impact of a 6-week, once-weekly exercise intervention on QoL, fatigue, and exercise participation in cancer survivors.
• To determine if the timing of exercise delivery (during active treatment vs. post-treatment) influences outcomes.
• To explore the long-term effects of the intervention at a 6-month follow-up.

Main Methods:

• An exploratory prospective cohort study involving 25 cancer survivors (11 active treatment, 14 completed treatment).
• Participants engaged in a weekly exercise and education program ('Fit for Life') for 6 weeks.
• Quality of life (EORTC QLQ C-30), fatigue (Brief Fatigue Inventory), and exercise participation (Godin Leisure Time Exercise Questionnaire) were assessed pre-intervention, post-intervention, and at 6-month follow-up.

Main Results:

• A significant interaction effect favored exercising during active treatment for long-term exercise participation (GLTEQ) at 6 months (p=0.01).
• A significant main effect for time was observed for the EORTC QLQ-C30 Global score, showing improvement from baseline to 6 months post-intervention.
• No significant group-by-time interactions were found for QoL (EORTC QLQ C-30) or fatigue (BFI) across the study duration.

Conclusions:

• Weekly exercise during cancer treatment may enhance long-term exercise adherence in adult cancer survivors.
• This low-volume exercise program shows potential for improving QoL but has limited impact on fatigue, suggesting insufficient dosage.
• The findings provide proof of concept for future larger randomized controlled trials investigating exercise in cancer survivorship.