It hurts, but it feels good. I believe that there are physical and/or neurochemical properties that make this either true or false for specific individuals. I'

It hurts, but it feels good. I believe that there are physical and/or neurochemical properties that make this either true or false for specific individuals. I'm just like your friend: exercise doesn't make me feel good or give me any sort of endorphin high; it just makes me tired and sore. I do the minimum that I figure will keep me in reasonable shape (and yes, I've done more in the past), but I'd much rather spend my time either being productive or relaxing.