title: Calcium metabolism, physical activity, and stress fractures.
mesh_terms: D000328:Adult; D002118:Calcium / Q000378:metabolism*; D005264:Femoral Fractures / Q000209:etiology; D006801:Humans; D008297:Male; D005082:Physical Exertion; D013314:Stress, Mechanical; D013978:Tibial Fractures / Q000209:etiology*
chemical_list: D002118:Calcium