How important is having a regular gym routine or going out for a jog to playing poker?

Some of the top players say they are a regular at the gym while others it is pretty obvious they would not know how to turn on a treadmill.

Do you think that this has any effect on poker ability or is it just a hobby for certain players who have more time to kill during the days since they do not have regular day jobs?

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Kickboyswoop