For years, exercise during and after cancer treatment has been recommended primarily because it improves fatigue, physical function, quality of life, strength, and overall well-being. A major new systematic review and meta-analysis published in the British Journal of Sports Medicine asks a more consequential question:
Can structured exercise improve cancer survival?
The results provide important new evidence that it may.
A major analysis of randomized controlled trials
Tzang and colleagues performed a systematic review and meta-analysis specifically examining survival outcomes from randomized controlled trials of structured exercise in adults with cancer. The analysis included 21 randomized trials involving 8,449 participants across several cancer types. Breast cancer accounted for approximately 75% of participants, an important limitation when applying the findings broadly to all cancers.
Unlike earlier observational studies which can show associations but cannot establish causation as reliably, randomized trials provide a substantially stronger test of whether an intervention itself contributes to better outcomes.
The findings were striking. Compared with control groups, structured exercise was associated with:
- 23% lower hazard of death overall– overall survival HR 0.77
- 17% improvement in disease-free survival– HR 0.83
- 18% lower risk of all-cause mortality– RR 0.82
- 26% lower risk of cancer-specific mortality– RR 0.74
The evidence was graded as moderate certainty for overall survival, disease-free survival, all-cause mortality, and cancer-specific mortality. The analysis did not demonstrate significant improvements in progression-free survival or pathological complete response, for which the evidence was less certain.
Adherence matters
One of the most important findings for Exercise Oncology programs involved adherence.
Among participants achieving high exercise adherence, generally at least 70%, the association with outcomes became stronger. Overall survival showed an HR of 0.72, and disease-free survival an HR of 0.71.
This has enormous practical implications. Simply telling a patient to “exercise more” is not equivalent to delivering a structured exercise intervention.
If exercise is going to function as a therapeutic component of cancer care, programs must help patients start, continue, and adhere to exercise despite fatigue, treatment toxicity, pain, deconditioning, and other barriers. The authors specifically emphasize supervision, individualized progression, behavioral strategies, and adapting exercise to symptoms as ways to maintain participation.
Exercise is moving beyond supportive care
Perhaps the most important message from this publication is the changing concept of what exercise represents in oncology.
Historically, exercise has largely been considered supportive care, something that helps patients feel and function better. This meta-analysis supports a broader possibility: structured exercise may be a therapeutic adjunct to cancer treatment itself, with potential effects on recurrence and survival.
The authors discuss several biologically plausible mechanisms, including enhanced antitumor immune activity, mobilization of cytotoxic T cells and natural killer cells, changes in tumor perfusion, metabolic effects, myokine signaling, and hormonal pathways. These mechanisms remain areas of continuing research and should not be interpreted as individually proven explanations for the survival findings.
Important cautions
These results should not be interpreted as proving that every exercise prescription improves survival for every cancer patient.
The trials differed considerably in exercise type, intensity, duration, supervision, and adherence. Breast cancer patients represented 75.3% of the study population, advanced cancers were underrepresented, and participants in exercise trials may be healthier and more motivated than the general cancer population. The authors therefore call for larger pragmatic trials across more cancer types, stages, and patient populations.
Importantly, resistance exercise should not be dismissed because resistance-only training did not show a statistically significant survival association. Only one small trial involving 129 participants evaluated resistance training alone, making that finding highly uncertain. Resistance training remains important for preserving muscle mass, strength, and combating sarcopenia.
What this means for Exercise Oncology
This publication represents an important evolution in the evidence supporting Exercise Oncology.
Exercise programs should increasingly be considered not simply recreational services or optional wellness programs, but potentially meaningful components of comprehensive cancer care. The authors conclude that clinicians can reasonably recommend structured exercise as part of oncology care while acknowledging that the optimal exercise prescription, dose, timing, and cancer-specific effects still require further study.
The emerging message is powerful:
Exercise may not only help cancer patients live better. Structured exercise may also help some patients live longer.
Call to Action: Make Exercise Part of Cancer Care
If you are undergoing cancer treatment or living after a cancer diagnosis, ask your oncology team about incorporating structured, individualized exercise into your care plan.
Exercise should be tailored to your cancer, treatment, physical condition, symptoms, and abilities. The goal should be more than simply receiving advice to “be active.” Programs should help patients exercise safely, progressively, and consistently.
For cancer centers and healthcare systems, the message is equally important: Exercise Oncology programs deserve consideration as part of the infrastructure of modern comprehensive cancer care.
At CancerFitness.org, our goal is to help patients, families, and cancer care professionals understand the growing evidence that exercise can be an integral part of the cancer journey from diagnosis and treatment through survivorship.
Move more. Build strength. Preserve function. And increasingly, the evidence suggests exercise may contribute to better cancer outcomes.
References: Structured exercise interventions and survival outcomes in patients with cancer: systematic review and meta-analysis of randomised controlled trials. Chih-Chen Tzang, Chiao-An Luo, Vicky Fu-Hsuan Kuo, et al. Br J Sports Med 2026;0:1–10. doi:10.1136/bjsports-2026-111664.
