Treadmill high

I was at the gym with David and I was telling him that when I'm there for an hour, at some point my mind clears up. I can think straight and any great ideas I had swimming in there are finally brought into focus. When Maye and I used to go to the gym on our lunch hours at work, I would leave for the gym feeling groggy and weighed down but when we came back I could focus and I was in a better mood.
While explaining this feeling to David, it made me thing of the movie The First Wives Club. Goldie Hawns character is a booze fiend (like me) and she's explaining the same high to Bette Middler and Diane Keaton.