The first way exercise can help you to prevent breast cancer is by reducing your hormone levels.
Cancer Research UK explains that being active and the amount of fat you have can affect the levels of some types of hormones in the body.
The advice reads: “Hormones are chemical messages that move around the body to tell different parts what to do.
“Oestrogen and insulin are hormones that could encourage breast cells to divide more often.
“If cells divide too much and grow out of control this can lead to cancer.
“As keeping a healthy weight and doing lots of activity can reduce the levels of oestrogen and insulin in the body, this could help to prevent breast cancer.”