1 Timothy 4:8
“for bodily exercise is profitable for a little; but godliness is profitable for all things, having promise of the life which now is, and of that which is to come.”
1 Timothy 4:8 ASV
https://www.bible.com/12/1ti.4.8.asv
I don’t think I have encountered a part of the Bible that specifically addressed exercise!
In this same section Timothy addresses that some people will fall away from the faith, not marry, and stop eating meat. (Which God has created for us to eat).
This is interesting advice about the will of God in these matters. He does want us to take care of our bodies, but he reiterates that this is not as important as godliness.
Mark K