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一般认为在20～30岁坚持体育锻炼的女性,其骨量峰值会得到提高,绝经后骨折的可能性也会下降。然而锻炼对骨量的影响作用会受到口服避孕剂的调控。18～31岁女性(共123名)分为口服避孕剂(OC)组和非口服避孕剂(NOC)组,再分别编入锻炼(E)组及非锻炼(NE)组。锻炼方法包括举重器、跳绳和自行车肌力仪每周3次,有氧训练或无氧训练,持续2年。每6个月,每个试验者接受双能X线吸收计(DEXA)对股骨颈扫描,并通过测定骨矿物含量、骨密度及其几何学信息来分析计算髋部的应力和弯曲强度,分别在6、12、18、24个月时,对从基线开始的百分比变化进行双向方差分析。经过24个月的
Generally believed that in 20 to 30-year-old women who adhere to physical activity, the peak bone mass will be increased, the possibility of postmenopausal fracture will decline. However, the effect of exercise on bone mass will be controlled by oral contraceptives. 18-year-old female (123 in total) was divided into oral contraceptive (OC) group and non-oral contraceptive agent (NOC) group, and then incorporated into exercise group (E) and non-exercise group (NE). Exercise methods include a weight lifter, skipping rope and a bicycle sounder three times a week, aerobic training or anaerobic training for 2 years. Every 6 months, each experimenter screened the femoral neck with a dual energy X-ray absorptiometer (DEXA) and analyzed hip hip stress and flexural strength by measuring bone mineral content, bone mineral density, and their geometric information, respectively Two-way analysis of variance was performed on percent change from baseline at 6, 12, 18, 24 months. After 24 months