Exercise
Also called: physical activity, structured exercise, training.
Last reviewed 2026-09-16. How this works.
Disease-free survival, resected colon cancer Grade A
Randomised human evidence of benefit.
A large trial found that people who did a structured exercise programme after bowel surgery lived longer.
A phase 3 randomised trial met its primary endpoint over nearly eight years.
The claim
The claim is that exercise after treatment for bowel cancer reduces the chance of the cancer coming back.
What it does
Several mechanisms have been proposed and none of them is why this entry is graded A. It is graded A because somebody ran the trial.
The evidence
CHALLENGE randomly assigned 889 people who had completed chemotherapy after bowel cancer surgery to a structured exercise programme or to health-education materials alone, at 55 centres, and followed them for a median of 7.9 years.1
It met its primary endpoint. Disease-free survival at five years was 80.3 percent against 73.9 percent, a difference of 6.4 percentage points. Overall survival at eight years was 90.3 percent against 83.2 percent.1
This is the entry that breaks the pattern of the rest of the book. It is not a supplement, it cannot be sold, and it was tested the way a drug is tested. That is what an A looks like.1
The studies this rests on
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CHALLENGE, structured exercise after adjuvant chemotherapy for colon cancer (NCT00819208)1
A randomised trial, open label, phase 3, measured survival, 889 participants.
met its primary endpoint of disease-free survival, with an overall survival difference at eight years.
hazard ratio 0.72, interval 0.55 to 0.94. disease-free survival, P=0.02; hazard ratio for death 0.63, interval 0.43 to 0.94
The harm
The trial recorded musculoskeletal problems in 18.5 percent of the exercise group against 11.5 percent of the comparison group. That is not a reason against it; it is the reason a programme is supervised.1
What to ask
Is there a structured exercise programme you could refer me to, now that my chemotherapy has finished?
Fatigue during and after treatment Grade A
Randomised human evidence of benefit.
Moving more is one of the best things known for the tiredness that comes with cancer treatment.
A large and consistent randomised literature, written into guidelines.
The claim
The claim is that exercise reduces cancer-related fatigue, which sounds wrong to anyone who is exhausted and is nonetheless what the evidence shows.
What it does
Cancer-related fatigue is not ordinary tiredness and rest does not fix it, which is why the intervention that helps is counterintuitive.5
The evidence
A Cochrane review of randomised trials of exercise for cancer-related fatigue identified 56 studies covering 4,068 participants, most of them in breast cancer. Pooling 38 comparisons, exercise was more effective than the control condition at the end of the intervention period.6
PREFERABLE-EFFECT randomly assigned 357 people with metastatic breast cancer at eight centres to usual care or a nine-month supervised exercise programme. At the six-month primary timepoint physical fatigue was lower in the exercise group.7
An international multidisciplinary roundtable reviewed the randomised literature and set out specific exercise prescriptions for specific endpoints, fatigue among them. Two major professional bodies published guidelines in 2022 echoing its conclusions. That statement summarises randomised work of this kind rather than reporting a trial, and is not read as one here.23
The volume of evidence behind this is unusual for anything in this book: a search indicated over 2,600 randomised controlled trials of exercise in oncology in people.3
The studies this rests on
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Roundtable consensus on exercise for cancer-related fatigue2
A guideline, not a study, summarising randomised trials, measured what patients reported.
sets an exercise prescription for fatigue, summarising the randomised literature.
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Cochrane review of randomised trials of exercise for cancer-related fatigue6
A meta-analysis, summarising randomised trials, measured what patients reported, 4068 participants.
exercise was more effective than the control condition at the end of the intervention period.
standardised mean difference -0.27, interval -0.37 to -0.17. pooled across 38 comparisons, with data for 1,461 participants who received an exercise intervention and 1,187 controls
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PREFERABLE-EFFECT, supervised exercise in metastatic breast cancer7
A randomised trial, measured what patients reported, 357 participants.
physical fatigue was lower in the exercise group at the six-month primary timepoint.
mean difference -5.3, interval -10 to -0.6. adjusted P=0.027, effect size 0.22
What to ask
Is the tiredness I have something exercise would help, and can you point me to a programme?
Physical function and fitness Grade B
Good human evidence, with a limit worth knowing.
Exercise improves how well people move and how fit they are, shown here by a guideline that gathers the trials rather than by a trial.
Good human evidence, held at one remove: the trials behind it are not on this page.
The claim
The claim is that exercise during and after cancer treatment improves physical function and fitness.
What it does
This is the least mysterious claim in the register. Training improves fitness, and having cancer does not suspend that.
The evidence
The roundtable sets out a specific exercise prescription for physical function and concludes that exercise training and testing are generally appropriate for people who have had cancer, and that everyone should keep moving.2
That statement summarises randomised trials rather than reporting one. What it summarises is not on this page, so it cannot be read, counted, or checked for what was left out, and that is the limit holding this claim at B rather than A.2
The studies this rests on
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Roundtable consensus on exercise for physical function2
A guideline, not a study, summarising randomised trials, measured what patients reported.
sets an exercise prescription for physical function.
What is absent
No trial reporting physical function or fitness as an endpoint is cited for this claim. The one source is a guideline, and the trials it draws on are not named here.
Scope: physical function or fitness as a reported endpoint, any tumour type.
Established by trial scope, checked 2026-09-16. Result: the only entry in this claim’s trials[] is a consensus statement typed as a guideline, and nothing in the record reports this endpoint.2
What to ask
The evidence here is a guideline rather than a trial, so what kind of activity would be sensible for me at this point in my treatment?
Quality of life Grade A
Randomised human evidence of benefit.
People who exercise during and after treatment report a better quality of life across many cancer types.
Randomised evidence, across a range of tumour types.
The claim
The claim is that exercise improves quality of life for people with cancer.
What it does
Quality of life is a measured outcome with validated instruments behind it, not a vague one, and it is measured from the person rather than from a scan.
The evidence
PREFERABLE-EFFECT randomly assigned 357 people with metastatic breast cancer to usual care or a nine-month supervised exercise programme. At the six-month primary timepoint health-related quality of life was higher in the exercise group.7
The roundtable sets a specific exercise prescription for quality of life, drawing on randomised evidence across tumour types. It summarises that evidence rather than reporting a trial.2
The studies this rests on
-
Roundtable consensus on exercise for quality of life2
A guideline, not a study, summarising randomised trials, measured what patients reported.
sets an exercise prescription for quality of life.
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PREFERABLE-EFFECT, supervised exercise in metastatic breast cancer7
A randomised trial, measured what patients reported, 357 participants.
health-related quality of life was higher in the exercise group at the six-month primary timepoint.
mean difference 4.8, interval 2.2 to 7.4. adjusted P=0.0003, effect size 0.33
What to ask
Would being more active help me feel better day to day while I am having this treatment?
Anxiety and depressive symptoms Grade B
Good human evidence, with a limit worth knowing.
Exercise helps with anxiety and low mood in people with cancer, though the effects are smaller than for tiredness.
Randomised evidence, with specific prescriptions attached to it.
The claim
The claim is that exercise helps with the anxiety and low mood that follow a diagnosis.
What it does
The same argument as for fatigue, with a smaller effect and a literature that is thinner.
The evidence
The roundtable sets specific exercise prescriptions for anxiety and for depression, which is a stronger statement than a general recommendation to be active.2
The studies this rests on
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Roundtable consensus on exercise for anxiety and depression2
A guideline, not a study, summarising randomised trials, measured what patients reported.
sets exercise prescriptions for anxiety and for depression.
What is absent
The individual trials behind this endpoint are not cited in this record. It rests on the guideline that summarises them.
Scope: anxiety and depressive symptoms.
Established by trial scope, checked 2026-09-16. Result: the only source for this claim in the record is a consensus statement.2
What to ask
Would exercise be a reasonable thing to try for how I have been feeling, alongside anything else you would suggest?
Survival in cancers other than colon Grade B
Good human evidence, with a limit worth knowing.
In other cancers the survival evidence comes from watching people rather than from trials, and trials are under way.
Consistent observational evidence. The trials are running.
The claim
The claim is that the CHALLENGE result in bowel cancer applies to other cancers too.
What it does
It may well. But this book spends its length arguing that observational evidence and randomised evidence are different things, and that rule does not get suspended for a finding the author likes.
The evidence
The roundtable records consistent observational evidence that physical activity after a cancer diagnosis reduces cancer-specific and all-cause mortality in early stage breast, colorectal and prostate cancer.2
Consistent observational evidence is what the statin chapter of this book is about, and it is exactly where survivor selection and immortal time bias live. The honest position is that this is promising and not established.2
A randomised trial of a two-year tailored exercise programme against overall survival in 866 men with metastatic prostate cancer, INTERVAL-GAP4, is the kind of study that would settle it.4
The studies this rests on
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Observational evidence on activity after diagnosis and mortality2
A guideline, not a study, summarising observational studies, measured survival.
consistent association between activity after diagnosis and lower cancer-specific and all-cause mortality in early stage breast, colorectal and prostate cancer.
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INTERVAL-GAP4, exercise and overall survival in metastatic prostate cancer4
A randomised trial, open label, phase 3, measured survival, 866 participants.
running, not yet reported. Nothing has been reported from it.
What is absent
No randomised trial has yet shown that exercise improves survival in a cancer other than colon. The evidence outside colon cancer is observational, and one randomised trial is running.
Scope: survival in cancers other than colon.
Established by trial scope, checked 2026-09-16. Result: the only randomised survival trial in this record is CHALLENGE, in colon cancer.124
What to ask
Is there randomised evidence for exercise in my type of cancer, or is it being extrapolated from bowel cancer?
The dish-to-person gap
Exercise is not a compound that reaches a concentration in the blood, so the dish-to-person comparison does not apply.
When to call your team — no warning signs are recorded
If you have started something new, or are thinking about it, the people treating you can only weigh it if they know about it. That is true when nothing has been written down here, and it is most true then.
The register records no warning signs for this entry. The phase 3 trial did record more musculoskeletal problems in the exercise group, which is what a supervised programme exists to manage.
Interactions
Exercise is not checked against treatment classes in this register. Starting something new during treatment is worth raising with the team, who know what your blood counts and bones are doing.
The whole interaction list, and how to turn it into a pharmacy review request.
Find a trial instead
Supervised programmes exist inside trials and inside ordinary cancer services, and a referral is usually the better route.
Search ClinicalTrials.gov for recruiting studies of exercise OR physical activity
A trial is the same decision with monitoring, a known preparation and a doctor who knows what else you are taking.
References
Courneya KS, Vardy JL, O'Callaghan CJ, Gill S, Friedenreich CM, Wong RKS, et al, for the CHALLENGE Investigators. Structured exercise after adjuvant chemotherapy for colon cancer. New England Journal of Medicine 2025;393(1):13-25.
doi:10.1056/NEJMoa2502760 · NCT00819208
How this was reached: transcribed from chapter note, via docs/CHAPTER-NOTES.json, chapter 21 note 2. The author string is abbreviated in the source that was read and has not been expanded.
Campbell KL, Winters-Stone KM, Wiskemann J, May AM, Schwartz AL, Courneya KS, Zucker DS, Matthews CE, Ligibel JA, Gerber LH, Morris GS, Patel AV, Hue TF, Perna FM, Schmitz KH. Exercise guidelines for cancer survivors: consensus statement from international multidisciplinary roundtable. Medicine and Science in Sports and Exercise 2019 Nov;51(11):2375-2390.
doi:10.1249/MSS.0000000000002116 · PubMed 31626055
How this was reached: transcribed from chapter note, via docs/CHAPTER-NOTES.json, chapter 21 note 3.
Figures from the American College of Sports Medicine on the state of exercise oncology, and guidelines published in 2022 by the American Cancer Society and the American Society of Clinical Oncology.
No persistent identifier recorded.
How this was reached: transcribed from chapter note, via docs/CHAPTER-NOTES.json, chapter 21 note 1.
INTERVAL-GAP4, Intense Exercise for Survival among Men with Metastatic Prostate Cancer.
No persistent identifier recorded.
How this was reached: transcribed from chapter note, via docs/CHAPTER-NOTES.json, chapter 21 note 6.
The position of the roundtable guidelines and the randomised literature they summarise, on cancer-related fatigue.
No persistent identifier recorded.
How this was reached: transcribed from chapter note, via docs/CHAPTER-NOTES.json, chapter 21 note 7.
The effect of exercise on cancer-related fatigue. Cochrane Database of Systematic Reviews, CD006145.
Cochrane CD006145
How this was reached: transcribed from chapter note, via docs/CHAPTER-NOTES.json, chapter 21 note 4.
Hiensch AE, Depenbusch J, Schmidt ME, Monninkhof EM, Pelaez M, Clauss D, Gunasekara N, Zimmer P, Belloso J, Trevaskis M, Rundqvist H, Wiskemann J, Muller J, Sweegers MG, Fremd C, Altena R, Gorecki M, Bijlsma R, van Leeuwen-Snoeks L, ten Bokkel Huinink D, Sonke G, Lahuerta A, Mann GB, Francis PA, Richardson G, Malter W, van der Wall E, Aaronson NK, Senkus E, Urruticoechea A, Zopf EM, Bloch W, Stuiver MM, Wengstrom Y, Steindorf K, May AM. Supervised, structured and individualized exercise in metastatic breast cancer: a randomized controlled trial. Nature Medicine 2024 Oct;30(10):2957-2966.
doi:10.1038/s41591-024-03143-y · PubMed 39054374 · NCT04120298
How this was reached: transcribed from chapter note, via docs/CHAPTER-NOTES.json, chapter 21 note 5.