So you need to build your body to go at top speed for a long time .

因此，你需要磨练自己的身体，维持长时间的快速移动。

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One possibility he says is that tears discharge certain chemicals from your body, chemicals that build up during stress.

他说，一种可能性是，眼泪会从身体中释放出某些化学物质，这些化学物质是在压力下积聚起来的。

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Every 4 weeks, cut back on your long run to give your body a chance to rest - it can't continue to build endurance without a break.

每过四周都将长距离跑的距离削减一部分，这样可以让你的身体有机会休息。——不可能没有休息而提高自己的耐力。

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Squats build muscle in your entire body, improve your balance and even help you go to the bathroom easier!

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Your body can build at most about a half-pound of muscle each week, so if you eat too many extra calories trying to build more muscle, you will gain fat, too.

CNN: How should I eat to build muscle mass?

Harper defines toning exercises as body-specific, weight-bearing routines that build lean muscle, often using no equipment and only your own body weight as resistance.

FORBES: Magazine Article