Craig, I've had the exact opposite happen. I used to workout for 1 1/2 hours a day, 5 or 6 days a week when I was thinking of entering a bodybuilding contest. I'd push myself extremely hard each workout. Afterwards my hearing was almost similar to being exposed to loud levels for a fair amount of time. Everything seemed compressed, highs sounded rolled off, etc. I couldn't enjoy music until a couple of hours later after my body had wound down.
Close your eyes and hear the music ?
It seems like music sounds better when I close my eyes. Some people claim that it sounds better with their glasses on. Someone once told me that if someone suggested that music sounded better in the nude that a large group of audiophiles would swear to it! What makes music better for you ?