To become more productive, go to the gym more frequently?

I think the strange bias in today’s world is that we must maximize our time being “productive“, using computers and stuff. The body is an afterthought; just do the minimum amount of exercise necessary, as efficiently at the gym, in order to maximize your computer productivity time.

However perhaps we have this all wrong. Maybe the priority should be going to the gym, 90% of your life focus on your body your muscles, and the productivity will come naturally afterwards?