The Bone Health in Female Runners Intervention Trial (B-FIT) is a randomized trial of the effect of oral contraceptives on bone mass and stress fracture incidence among female cross country runners in the United States.  We are currently analyzing results from the trial.


 Healthy Bone

 Osteoporotic Bone





B-FIT at a Glance how this trial works

Bone Health Information a quick reference for understanding bone health

B-FIT Newsletters view current and past volumes of the B-FIT newsletter, which includes interviews with elite runners, scientific findings relevant to running, recipes, and more

Running Links

Stanford University 

Information on the female athlete triad