Physical activity and breast cancer.

Grace Bugden, Kerri Palmer-Quinn, Hannah Moody

Peer reviewed by two members of Breast Cancer UK's independent Science Panel.

Published: 24/09/2026

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Summary

Physical activity is associated with a lower risk of breast cancer and breast cancer mortality following a breast cancer diagnosis. Those who engage in the highest levels of physical activity are estimated to have a 15% lower risk of breast cancer than those who engage in the lowest levels, on average. These effects are likely mediated through multiple biological mechanisms, including favourable changes in hormone levels, metabolism, inflammation and immune function, and are only partly explained by weight management. Physical activity also offers a broad range of other health benefits, including a reduction in risk of several other diseases. Despite this, global physical inactivity levels are rising. This has led to increased efforts to identify new incentives to encourage physical activity both globally and nationally. Together, the evidence indicates that regular physical activity is an effective strategy for reducing breast cancer risk and improving overall health and wellbeing.

How to cite:

Bugden, G., Palmer-Quinn K., Moody H. Physical activity and breast cancer. Breast Cancer UK. 2026. https://doi.org/10.71450/15254990

Next update: 24/09/2029