Bone density contributes to the strength of the bones; and their density changes in response to body weight and to weight-bearing exercise.

骨密度代表骨的强度，骨密度依随体重和负重锻炼而相应升降变化。

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This paper analyses the density of exercise and the load of sports in the course of PE teaching in Tong Jiaqiao Middle school by applying the information and the method of comparative analysis.

运用文献资料和比较分析等方法，调查分析了重庆童家桥中学教学过程中的体育课练习密度和运动负荷。

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After the intervention, the exercise group significantly improved their femoral neck bone density score while the control group significantly decreased.

通过介入干预后，运动组的大腿和颈部的骨密度数值明显增加，而对照组的数值明显下降。

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It will also store a treadmill the crew must use regularly to exercise their bodies and maintain bone density.

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After three years, those in the exercise therapy group had maintained their bone density, unlike the small control group that was inactive.

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Anaerobic exercise (weight or strength training) helps form bone density and builds muscle that more efficiently burns calories.

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