Regular vigorous exercise reduces the risk of aggressive breast cancer in black women, says study.

ER- tumors do not respond to hormone therapies used to treat tumors that have the estrogen receptor. "These findings are very encouraging. Knowing that exercise may protect against breast cancers that disproportionately strike black women is of great public health importance," says Lucile Adams-Campbell, PhD, professor of oncology and associate director of Minority Health & Health Disparities Research at Georgetown Lombardi. "We all want to do what we can to reduce our risk of disease and improve our health, and along with other well known benefits, we now show that exercise can possibly stave off development of potentially lethal breast cancer in black women," she says. Exercise, at any level, appeared to have no effect on development of estrogen receptor-positive (ER+) in these women, the researchers say.
They cannot offer a reason why because their study was not designed to answer this question. They also cannot speculate on whether vigorous exercise in white women would have any effect. The 44,704 women who participated in the study were 30 years or age or older.
Source-Eurekalert