目的 :追踪观察健身锻炼对老年男性跟骨骨密度和性激素变化的影响。方法 :通过功率自行车递增负荷有氧运动方式 ,测定 14周运动锻炼期间老年男性跟骨骨密度、性激素以及血钙(Ca)、磷 (P)及碱性磷酸酶 (ALP)的变化。结果 :老年男性血Ca、血P和ALP浓度在第 8周时显著高于锻炼前 ,第 14周时与锻炼前无显著差异 ;跟骨骨密度、T值和QUI第 4、8、14周均显著高于锻炼前 ;血清睾酮 (T)一直变化不大 ,雌二醇 (E2 )、促性腺激素浓度第 8、14周均变化明显。提示 :坚持适宜的功率自行车运动可增加老年男性跟骨骨密度 ,有利于骨量保持 OBJECTIVE: To observe the effect of exercise on bone density and sex hormone in elderly men. Methods: The dynamic changes of bone mineral density (BMD), sex hormones, Ca, P and ALP in elderly men during 14-week physical activity were measured by incremental cycling aerobic exercise. Results: The concentrations of blood Ca, blood P and ALP in elderly men were significantly higher than those before exercise at week 8 and before exercise at 14 weeks. The calcaneal bone mineral density, T value and QUI at weeks 4, 8 and 14 Were significantly higher than before exercise; serum testosterone (T) has been little changed, estradiol (E2), gonadotropin concentrations at 8,14 weeks were significantly changed. Tip: Adhere to the appropriate power cycling can increase the elderly men’s calcaneus bone density, is conducive to maintaining bone mass