AIM: to investigate the life factors influencing bone density of college students, so as to guide them to improve bone density and prevent osteoporosis.

目的：认识影响大学生骨密度的各种生活因子，以便指导大学生提高骨密度，预防骨质疏松症的发生。

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They can improve bone density by two to 10 percent over several years to a decade and reduce fractures, but many patients' bone density already has been reduced by half when treatment begins.

通过减少骨吸收产生作用，它们可以几年到十年的时间里提高百分之二至百分之十的骨密度，并减少骨折发生，但许多患者的骨密度已经减少了一半治疗才开始。

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Strength training has been proven to increase bone density, increase lean muscle mass, improve posture, and reduce the risk of injury.

已证实，力量训练能增大骨质密度，增加瘦肌体积，改善姿势，减少损伤的风险。

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Which is why, during the trials, a group of doctors led by Robert Grossman of the Methodist Hospital, Houston, will monitor such things as the participants' bone density, respiratory function and cardiovascular systems, all of which are expected to improve when someone is no longer stuck in a wheelchair.

ECONOMIST: Bionics (I)