Exercise appears to change the way women's bodies metabolise the hormone
oestrogen, and this could help explain how aerobic activity reduces a woman's
breast cancer risk, a new study suggests.
"Ours is the first study to show that aerobic exercise influences the way our
bodies break down estrogens to produce more of the 'good' metabolites that lower
breast cancer risk," she said.
How the study was done
The US National Cancer Institute has more about breast