Cancer and Exercise: Should You Train During Treatment?
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Cancer is one of the biggest health challenges a person can face, and the conversation around exercise, nutrition, and lifestyle in cancer prevention and treatment has evolved significantly. Gone are the days when people were told to just rest—we now know that staying active can play a crucial role in both prevention and improving quality of life during treatment.
Understanding Cancer and Its Treatments
Cancer isn’t just one disease—it’s a collection of diseases that involve abnormal cell growth. There are different types of cancer treatments, including:
• Surgery – Removing tumors when possible
• Chemotherapy – Using drugs to kill cancer cells
• Radiation Therapy – Targeting cancer with radiation
• Immunotherapy – Boosting the body’s immune system to fight cancer
• Hormone Therapy – Blocking hormones that fuel certain cancers
• Targeted Therapy – Attacking cancer cells at a molecular level
Each of these treatments comes with unique side effects—fatigue, nausea, muscle loss, and immune suppression—which can impact how a person feels and moves during treatment.
The Role of Exercise During Cancer Treatment
One of the biggest questions people ask is: “Should I exercise while I have cancer?” The short answer? Yes, if you can.
The old belief was that cancer patients should avoid exertion, but research now shows that exercise can help in multiple ways, including:
✅ Reducing fatigue – Regular movement can actually combat cancer-related fatigue
✅ Preserving muscle mass – Preventing excessive muscle loss during treatment
✅ Improving mood – Exercise releases endorphins, helping with mental well-being
✅ Enhancing immune function – Supporting the body’s ability to fight infection
✅ Managing treatment side effects – Reducing nausea, neuropathy, and brain fog
✅ Improving quality of life – Keeping people independent and mobile
That said, exercise should be adapted based on the type of treatment and how the individual is feeling. Some days, a short walk or stretching session might be enough. Other days, strength training and resistance exercises can help maintain function and strength.
How Cancer Develops: The Immune System and Environmental Factors
A newer theory of cancer suggests that our bodies are constantly creating cancer cells, but our immune system keeps them in check. When the immune system is compromised—due to factors like chronic stress, poor sleep, poor diet, excessive alcohol consumption, and lack of exercise—it may struggle to stop these cells from multiplying.
But lifestyle isn’t the only factor—environmental toxins and smoking also play a huge role.