I'm doing better at listening to my body and taking it easier as needed. I wonder if the positive benefits of exercise on the brain (endorphins, seroetonins) could be why so many of us jump in too fast and furious. We start to exercise, and once over the initial soreness, realize it makes us feel good. So we keep going when we should slow down. Just a thought.
Sounds better than I figured out about myself, which was I'm in a lot worse shape than I realized and figured I should be able to do more.
Of course, I never waited until the soreness was gone and kept on doing it. I gave up. It wasn't until seeing the big 50 coming that got me doing slow and steady.