Without proper nutrition, hormones, and rest, your body would never be able to repair damaged muscle fibers.

没有所需的营养，激素，和休息，你的身体永远不能修复受损的肌肉组织。

Some people have more robust immune reactions to muscle damage, and are better able to repair and replace damaged muscle fibers, increasing their muscle-building potential.

有些人对肌肉损伤有更强大的免疫反应，更容易修复和替换受损肌肉纤维，这都加大了肌肉增长的潜力。