瓦那嘎特说，就像是连挨了两拳，变老以后，肌肉里的能量单元不断损耗，随着时间的推移，这种伤害不断积累；除此以外，身体对于损害的修复能力也因老化而缩小。

The energy powerhouse cells in muscles get damaged with age. That damage accumulates over time and, on top of that, the body's ability to repair that damage also dwindles with aging.

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各自有各自不同的见解，尔不能说哪条路就一定是正确的，尔只能说，尔尽量让这条路变的平淡些，尽量少被绊倒，让所有人都少受一些伤害。

Each have different opinions, cannot say which road must be correct, can only say, try to make this road tamed some, less as far as possible, let everybody down by some less damage.

youdao

从运动生理学的角度，我们可以得出一个造成肩膀伤害的主要原因，还有个能立即让你的呼吸变容易的办法。

From a stroke mechanics perspective, there is one major cause of shoulder problems and that is the instinctive way in which swim to make breathing easier.

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