Another reason to exercise, guys: it can reduce tumour growth, found a new rat study published in the Journal of the National Cancer Institute.

Abnormal blood vessel growth in a tumour, caused by low O2 levels (hypoxia) can lead to aggressive tumour growth and resistance to systematic cancer therapies.

When compared to resting, researchers found that exercise can activate a 200% increase in tumour blood flow and increase blood vessels in the tumour itself. This means a 50% reduction in tumour hypoxia.

Authors suggest that exercise could be useful in reducing the hypoxic environment in the tumour that’s associated with aggressive growth and treatment failure. As exercise increases blood flow to the tumour, it may boost drug delivery to the tumour.

* This is a preliminary study and more research is needed to see how they apply to humans