# Fund structured exercise after colon cancer surgery as a treatment, because a randomised trial says it works as well as a drug

Source: https://onco.cc/ideas/idea-crc-exercise-as-a-funded-treatment/  
OnCo record `idea-crc-exercise-as-a-funded-treatment` (Idea). Data CC BY-NC 4.0, attribute "Data from OnCo (onco.cc)"; commercial use needs a licence.

## TL;DR

A three-year supervised exercise programme after chemotherapy cut recurrence and death by roughly a third in 889 patients, an effect the size of adjuvant chemotherapy. No health system has a funding line for it.

## Summary

CHALLENGE randomised 889 patients with resected colon cancer who had completed adjuvant chemotherapy to a structured exercise programme or health-education materials over three years. At a median 7.9 years, disease-free survival favoured exercise with a hazard ratio of 0.72 (five-year disease-free survival 80.3 against 73.9 percent), and overall survival with a hazard ratio of 0.63 (eight-year overall survival 90.3 against 83.2 percent). Musculoskeletal adverse events were more common with exercise (18.5 against 11.5 percent).

The trial took 15 years to enrol because no commercial sponsor benefits from the result, and the intervention is a supervised programme with a behaviour-support consultant rather than advice to be more active. That is the gap: the evidence is now stronger than for several funded drugs in the same setting, and the implementation question, who employs the trainers and how patients are referred, has never been tested in a health system.

## Fields

- Kind: Idea
- Last checked: 2026-09-24
- Tags: colorectal-evidence
- Hypothesis: A funded, referral-based structured exercise service for patients completing adjuvant chemotherapy for colon cancer reproduces at least half of the CHALLENGE disease-free survival effect in routine practice, at a cost per quality-adjusted life year below the threshold used for adjuvant drugs in the same indication.
- Rationale: The randomised effect size is comparable to adjuvant chemotherapy at a fraction of the drug cost and with reversible musculoskeletal rather than neurological harm; the only untested step is whether a health service can deliver the programme as the trial did.
- Proposed test: A stepped-wedge implementation trial across cancer centres, with adherence to the exercise prescription and three-year disease-free survival as co-primary endpoints, a pre-registered health-economic analysis, and equity of referral and completion by deprivation quintile as a reported outcome.
- Maturity: early-clinical
- Actor: payer

## Sources

- Courneya et al.: CHALLENGE (N Engl J Med 2025): https://europepmc.org/article/MED/40450658

## Connected records

- roadmaps: [Colorectal cancer roadmap: from the adenoma-carcinoma sequence and the first screening trials to total mesorectal excision, oxaliplatin, RAS testing, immunotherapy for mismatch repair-deficient disease, ctDNA-guided treatment and organ preservation](https://onco.cc/roadmaps/colorectal-roadmap/), [Diet, exercise and lifestyle roadmap: causes established → interventions that disappointed → exercise proven as treatment](https://onco.cc/roadmaps/nutrition-lifestyle-roadmap/), [Supportive care and survivorship roadmap: making treatment bearable → proving it extends life → caring for tens of millions afterwards](https://onco.cc/roadmaps/survivorship-roadmap/)
- cancers: [Colon cancer (adenocarcinoma of the colon)](https://onco.cc/cancers/colon-cancer/), [Colorectal cancer](https://onco.cc/cancers/colorectal/)
- fronts: [Diet, Exercise & Lifestyle](https://onco.cc/fronts/nutrition-lifestyle/), [Supportive Care & Survivorship](https://onco.cc/fronts/supportive-care/)
- technologies: [Exercise & lifestyle oncology](https://onco.cc/technologies/exercise-oncology/)
- bottlenecks: [Funding follows fashion, not burden](https://onco.cc/bottlenecks/b-funding-allocation/), [Incentives reward me-too drugs and marginal gains](https://onco.cc/bottlenecks/b-incentive-misalignment/), [Prevention we already have is not deployed](https://onco.cc/bottlenecks/b-prevention-adoption/), [Survivorship and late effects are neglected](https://onco.cc/bottlenecks/b-survivorship/)
- key papers: [Structured exercise after adjuvant chemotherapy for colon cancer (CHALLENGE)](https://onco.cc/key-papers/paper-courneya-challenge-structured-exercise-colon-nejm-2025/)

---
JSON: https://onco.cc/api/v1/entities/idea-crc-exercise-as-a-funded-treatment.json