Physical Activity and Endogenous Sex Hormone Levels in Postmenopausal Women: a Cross-Sectional Study in the Prospect-EPIC Cohort

The protective effect of physical activity on breast cancer risk might be mediated by sex hormone levels. In this study, we examined the association between usual physical activity and plasma levels of estrogens, androgens, dehydroepiandrosterone sulphate (DHEAS), and sex hormone binding globulin (SHBG) in postmenopausal women.We conducted a cross-sectional study among 806 postmenopausal women participating in the Prospect-EPIC study. Usual...