Factors affecting bone loss in female endurance athletes: a two-year follow-up study

摘要: Background: Low bone mass leading to stress fractures is a well-known and yet unsolved problem among female athletes.Purpose: To quantify the rate of loss in healthy athletes investigate effects estrogen vitamin K supplementation on loss.Study Design: Prospective cohort study.Methods: We classified 115 endurance into amenorrheic, eumenorrheic, or estrogen-supplemented groups randomized them receive either placebo K1. The mineral densities subjects' femoral neck lumbar spine were measured at baseline after 2 years.Results: Bone density remained constant, but had decreased significantly years all three subgroups. decrease was higher amenorrheic (—6.5% ± 4.0%) than eumenorrheic (—3.2% 4.1%) (—3.9% 3.1%). Supplementation with did not affect loss.Conclusions: loss...