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首页> 外文期刊>Endocrine journal >Effects of Exercise and Amenorrhea on Bone Mineral Density in Teenage Runners
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Effects of Exercise and Amenorrhea on Bone Mineral Density in Teenage Runners

机译：运动和闭经对青少年跑步者骨矿物质密度的影响

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References(25) Cited-By(12) In order to elucidate whether exercise and calcium intake can offset bone loss due to hypoestrogenemia in teenage girls, the lumbar and femoral bone mineral density (BMD) in elite amenorrheic runners (group 1 (n=8)) was compared with those in eumenorrheic athletes (group 2 (n=15)) and two groups of eumenorrheic non-athletic subjects, group 3 (n=14), and group 4 (n=15). BMD was measured by dual energy x-ray absorptiometry. The subjects in group 1 lived in the dormitory, and their calcium intake was controlled to 1400mg/day. The subjects in groups 1, 2 and 3 were age matched (16-17 years old), but the body weight of those in group 2 was significantly greater than that of others. The subjects in groups 1, 3 and 4 were weight matched, but group 4 subjects were older by 5 years (21.0 ±0.2 years old). The lumbar BMD of group 1 was 1.0460±0.0259, which was not statistically different from those in the other groups, while the femoral BMD of group 1 was significantly higher than those of groups 3 and 4 at trochanter. The lumbar and femoral BMD of group 2 was significantly higher than in groups 3 and 4, but was not statistically different from group 1. There were no significant differences in serum parathyroid hormone levels, but osteocalcin and calcitonin levels of group 1 were significantly lower than those of groups 2 and 3, and groups 2, 3 and 4, respectively, suggesting that the rate of bone formation is suppressed in amenorrheic runners. These results indicate that the physical activity during the teens can offset bone loss due to exercise-induced amenorrhea, but the effect seems to be temporary because the rate of bone formation has been altered in these girls.
机译：参考文献（25）Cited-By（12）为了阐明运动和钙摄入是否可以抵消由于少女的低雌激素血症引起的骨质流失，在精英闭经运动员中，腰椎和股骨的骨密度（BMD）（第1组（n = 8））与非漏尿运动员（第2组（n = 15））和两组非漏尿非运动受试者（第3组（n = 14）和第4组（n = 15））进行了比较。 BMD通过双能X射线吸收法测量。第一组的受试者生活在宿舍中，其钙摄入量控制在> 1400mg /天。第1、2和3组的受试者年龄匹配（16-17岁），但第2组的受试者的体重明显大于其他受试者。第1、3和4组的受试者体重匹配，但第4组的受试者年龄大5岁（21.0±0.2岁）。第1组腰椎BMD为1.0460±0.0259，与其他各组相比无统计学差异，第1组股骨BMD明显高于大转子3、4。第2组的腰椎和股骨BMD显着高于第3和第4组，但与第1组无统计学差异。血清甲状旁腺激素水平无显着差异，但第1组的骨钙素和降钙素水平显着低于第1组。分别在第2组和第3组以及第2组，第3组和第4组中，提示在闭经者中骨形成的速率受到抑制。这些结果表明，青少年时期的体育锻炼可以抵消由于运动引起的闭经而造成的骨质流失，但这种效果似乎是暂时的，因为这些女孩的骨形成速率已经改变。

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