I do exercise to keep thing ticking over. 5km jogs. You hear of people who experience feelings of well-being, even rushes of euphoria, to which they become addicted. Who *are* these people? Sport/exercise to me has always felt like being dragged around a field by a rabid bull. A necessary evil.
@Richard_Littler have you tried something that requires more brain power while you do it? Technique based dance, martial arts, t’ai chi? That sort of thing. I envy you the willpower to do something you hate but I find I need something that gets my brain into my body to keep my interest and get me off the couch. (I can then do things I have in support of that.)