我们睡觉的时候，身体会释放生长激素或者人体生长激素。

When we sleep, growth hormone, or HGH. is released into our bodies.

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人体生长激素能促进身体健康成长，细胞修复和再生，这对肌肉的发育是非常有必要的。

HGH stimulates healthy growth, cell repair and the regeneration which is necessary for muscle development.

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当我们睡觉的时候，人体的生长激素会被加速释放。

While we sleep human growth hormone is released in spurts.

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当我们睡觉的时候，人体的生长激素会被加速释放。

While we sleep human growth hormone is released in spurts.

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