And the problem is that they think [such strain] is normal.
问题是他们认为[这种疲劳]是正常的。
The incidence of lumbar muscle strain in athlete and normal people are both high.
损是一种多发病及常见病，在运动员和普通人群中都有较高的发生率。
The incidence of lumbar muscle strain in athlete and normal people are both high.
损是一种多发病及常见病，在运动员和普通人群中都有较高的发生率。
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