Many people can remain physically active during cancer treatment, but the right amount and type of activity varies. Exercise is not a test of willpower, and it does not need to be intense to be worthwhile.
The safest starting point is your current ability, your treatment, and any specific risks your clinical team has identified.
What counts as exercise?
Exercise can mean a planned walk, cycling, swimming, strength work or a structured class. It can also mean short periods of movement spread through the day. For someone who is unwell or recovering, standing regularly or walking around the home may be a meaningful step.
The aim is often to maintain function and confidence rather than to improve athletic performance.
Why activity may help
Appropriate physical activity may help some people with fitness, strength, fatigue, mood and the ability to manage everyday tasks. The likely benefits and the amount of evidence vary between cancer settings and treatments.
Exercise should sit alongside medical care. It is not a substitute for cancer treatment, and difficulty exercising does not mean that someone is causing their cancer to worsen.
When exercise may need to change
Ask for individual advice if you have:
- cancer affecting bone or a risk of fracture;
- low blood counts or a high risk of infection or bleeding;
- significant anaemia, breathlessness or heart problems;
- balance problems, weakness or numbness;
- recent surgery, a wound, a line or a stoma;
- severe pain, fever, dehydration or uncontrolled symptoms.
This list is not complete. Some treatments have precautions that apply only for a particular period.
A practical way to begin
If your team has not advised against activity, consider starting below the level you think you can manage. Increase gradually and allow for treatment cycles. Energy may be better on some days than others.
A simple plan might include:
- brief walks at a comfortable pace;
- gentle strength exercises using body weight or light resistance;
- breaks before exhaustion rather than after it;
- recording how you feel during and after activity.
Specialist cancer rehabilitation, physiotherapy or exercise services may be available in some areas.
Stop and seek advice when needed
Stop exercising and seek prompt medical advice for symptoms such as chest pain, fainting, severe breathlessness, new weakness, a sudden severe headache, or symptoms your team has told you require urgent assessment.
Questions for your team
- Are there activities I should avoid during this treatment?
- Do my blood results or bone health change what is safe?
- Can I be referred to rehabilitation, physiotherapy or an exercise professional?
- How should I adapt activity on treatment days?
The most useful activity plan is one that is safe, realistic and flexible enough to reflect how you are feeling.