Get Moving To Reduce Breast Cancer Risk

Regular physical activity supports overall health and is associated with a lower risk of breast cancer. That association does not mean exercise can prevent every case, and no lifestyle choice guarantees protection from cancer. Physical activity is one evidence-based step people can discuss with their healthcare provider as part of a broader risk-reduction plan.

What the experts say

Researchers continue to study why physical activity is associated with lower breast cancer risk. Possible explanations include its effects on body weight, inflammation, insulin, and hormone levels. These are population-level associations, not a promise about any one person’s outcome.

Amount of exercise women require

The appropriate amount and intensity of activity depends on a person’s health, treatment history, mobility, and current fitness. Small increases in movement can be worthwhile. Anyone beginning or changing an exercise program—especially during or after cancer treatment—should ask a qualified healthcare professional what is appropriate for them.

Distinguishing between moderate and vigorous exercise

Some examples of moderate intensity exercises are brisk walking, doubles tennis, golfing and yoga. Others are dancing, softball, garden maintenance and general yard maintenance. Under the vigorous exercise category, you have swimming, jogging, running and basketball. Other forms of vigorous exercise are soccer, singles tennis, aerobic dance and fast bicycling. Note that you are supposed to do the exercises above in addition to activities that form part of your daily routine. Some of these activities are walking from your house to the bus stop, climbing a flight of steps and moving around in your place of work.

Avoid prolonged sitting

Reducing long periods of inactivity can make it easier to add movement throughout the day. Walking during a break, taking the stairs when safe, or using a standing workstation are practical options for some people. Choose activities that are safe and sustainable for your circumstances. Physical activity can lower risk, but it cannot guarantee that someone will avoid or “beat” breast cancer. For current evidence, see the National Cancer Institute’s breast cancer prevention overview (updated December 2, 2025).