It was not known, however, whether central fatigue might also affect motor systems not directly involved in the exercise itself, such as those that move the eyes.

然而，目前人们还不清楚，中枢疲劳是否会影响与运动本身没有直接关系的运动系统，比如控制眼动的系统。

youdao

But it is hard to assign much credit to the exercise itself.

但是很难将太多功劳归功于该目标本身。

youdao

Then it began to exercise itself, imitating and paralleling what mind was doing.

然后，他开始自己练习，模仿和比照心灵的所作所为。

youdao

Exercise itself is the most highly potent stimulus of muscle growth.

BBC: Image of a bodybuilder

As for the effect of exercise on work productivity, there is no evidence connecting the two and we cannot know if exercise itself helps to enhance work productivity.

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He added the Royal Charter would be in place to ensure the system was independent and not to exercise control itself.

BBC: UK