The quote on my daily running calendar is, “There is magic in misery, just ask any runner.” by Dean Karnazes. He is an ultramarathon runner and author of Ultramarathon Man. I haven’t read the book and clearly I haven’t felt the misery enough yet to feel the magic!
I have felt the tremendous runners high and great feeling of accomplishment after running. I don’t think the distance matters or the amount of suffering, unless you are into that, I think it is just doing what is right for you and makes you feel challenged. I truly enjoy the challenge of running every day.
Run happy!