Loss of muscle mass and strength contribute to frailty and are associated with falls, mobility limitations and fractures.

肌肉和力量缺失致使懦弱，同时与坠落、移动受限和骨折相关。

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"[one] effect of lower testosterone levels is loss of muscle mass and increases in fat mass," Prof Bribiescas writes in his book How Men Age: What Evolution Reveals About Male Health and Mortality.

“睾酮水平降低的影响之一就是肌肉含量减少、脂肪含量增加，”布比斯·卡斯博士在《男性的衰老之旅：进化所揭示的关于男性健康和死亡的真相》一书中写道。

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The control group showed a decrease in soleus muscle mass and strength, the development of insulin resistance, and a loss of bone mineral density and resistance to breakage.

控制组的老鼠表现出比目鱼肌质量和力量下降，胰岛素抵抗上升，骨密度和抗折能力降低。

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More estrone leads to insulin resistance and a loss of muscle mass.

CNN: Why you really should get 'Fit By 40'

But it's still a little low in calories and fat for optimal health, she said, and could lead to a loss of muscle mass, which is difficult to rebuild.

CNN: The #NYFW diet: Part of the job?

It is important not to cut carbohydrates significantly on days that you are exercising strenuously, as this will negatively affect your energy level and will probably result in loss of lean body mass (muscle, bone, and water) which can impair weight loss efforts long term.

CNN: How can I maintain my energy level for sports while on a diet?