Bone Health in Female Runners Intervention Trial (B-FIT) Many female distance runners experience a loss of menstruation which is an indication of low levels of estrogen. Being low in estrogen leads to poor bone health. We are looking for competitive women runners ages 18-25 who are interested in becoming a par http://www.stanford.edu/~kcobb/bfit/ Stanford.edu~Site InfoWhoisTrace RouteRBL Check