Maintain muscle mass.

保持肌肉质量。

youdao

I used it to maintain muscle mass while training for the San Diego Marathon.

我在备战圣地亚哥马拉松赛时用它来锻炼肌肉力量。

youdao

It packs a lot of the proteins that help you maintain muscle mass - and muscle burns four times as many calories as fat.

它富含能够维持你肌肉容积的蛋白质，而肌肉燃烧的热量是脂肪的4倍之多。

youdao

Growth hormone is a naturally occurring substance secreted by the brain that helps guide growth in childhood and maintain muscle mass during adulthood.

FORBES: Sweet syringe of youth

Not only are you healthier as a result, your comprehensive exercise program, which includes cardiovascular and weight-bearing exercise, is preventing further weight gain and allowing you to maintain muscle mass so your metabolism does not drop significantly as you get older.

CNN: I'm exercising; why can't I lose weight?

The science is increasingly clear: Older adults need both strength training, to help replenish and maintain the muscle mass and (for women especially) the bone density our bodies lose each year as we age, and cardio to help guard against the risks of clogged arteries in the heart and brain.

WSJ: Exercise in Retirement: Cardio vs. Weight Training