Study of 130,000 women used genetic analysis to establish causal link between activity levels and cancer risk

Women undergoing chemotherapy for breast cancer who stayed physically active had fewer problems with memory and thinking.

Olympic high jump bronze medal winner Chaunte Lowe has defeated breast cancer, and now she's determined to reach the postponed Tokyo Olympics so she can tell her story, raise awareness and inspire others.

In a new study, rats with low natural fitness were about four times as likely to develop breast cancer as those with high fitness.

Doctors are studying whether weight loss improves survival for heavy patients.