Exercise Modalities for Depression and Anxiety in Cancer Survivors: Network Meta-Analysis

Overview

This systematic review and Bayesian network meta-analysis of 94 randomized controlled trials involving 7,668 cancer survivors found that exercise interventions produce small-to-moderate improvements in depression and anxiety. Mind-body exercises such as Tai Chi and Qi gong, as well as aerobic exercise, showed the most stable and consistent benefits, with recommended exercise doses identified for optimal symptom relief.

Background

Depression and anxiety are prevalent and persistent among cancer survivors, significantly impairing quality of life. Conventional psychological and pharmacological treatments have limitations in accessibility and effectiveness. Exercise interventions offer scalable, low-cost options with additional benefits for fatigue and sleep quality. However, prior research has often focused on single cancer types or exercise prescriptions, limiting generalizability and dose standardization.

Data Highlights

Key Findings

• Exercise interventions yield small-to-moderate improvements in depression and anxiety among cancer survivors compared to non-exercise controls.
• For depression, Pilates, Tai Chi and Qi gong, and aerobic exercise ranked highest in effectiveness with SUCRA values above 0.75.
• For anxiety, Pilates and HIIT showed promising effects but were based on few small trials; Tai Chi, Qi gong, and aerobic exercise demonstrated more stable benefits in larger samples.
• Optimal exercise doses for depression were approximately 2.8 METs intensity, 40 minutes per session, six sessions per week; for anxiety, moderate intensity and duration, five sessions per week were recommended.
• Exercise benefits plateaued around 20 weeks with no additional gains at follow-up.
• Higher BMI and older age may reduce exercise effectiveness; female proportion did not significantly affect outcomes.

Clinical Implications

Mind-body exercises such as Tai Chi and Qi gong should be considered first-line exercise interventions for alleviating depression and anxiety in cancer survivors due to their stable evidence base. Aerobic exercise also provides consistent benefits and can be incorporated based on patient preference and feasibility. Exercise prescriptions should be individualized, targeting moderate intensity and frequency over approximately 20 weeks to optimize mental health outcomes.

Conclusion

Exercise is an effective adjunctive therapy for reducing depression and anxiety symptoms in cancer survivors, with mind-body and aerobic modalities showing the most robust evidence. Tailored exercise prescriptions considering intensity, duration, and frequency can enhance psychological well-being in this population.

References

1. Wang et al. 2025 -- Impact of Various Exercise Modalities on Depression and Anxiety Among Cancer Survivors: A Systematic Review and Bayesian Network Meta-Analysis