Warning: My habit of skipping cool-downs after runs caught up with me
I used to finish my runs and just head inside, thinking cool-downs were a waste of time. Last year, my knees started aching so bad I could hardly walk. My doctor told me that skipping those few minutes of stretching was causing the issues. Now, I always do a proper cool-down, and my joints feel much better. It's funny how something so simple took me so long to learn.