Ostrodumov hummed. He did not believe him. " Who knows? He's such a busy body, " he thought.

奥斯特罗杜莫夫哼了一声。他不相信他。“谁知道呢？他真是个忙碌的人， ” 他想。

And this seems quite apparent because exercise can provide a stress-free environment away from your usual stresses and it keeps your body busy and preoccupied with non-stressful things.

这似乎很明显，因为锻炼可以让你远离压力，让身体动起来，专注于无压力的事情。