Endorphins keep me runnin.
I'm having trouble running past the 10 mile mark. Its a barrier that my knees and feet dont want to break through yet. I've only been running for 3 months so maybe the feet and knees need more time. Its just joint pain rather than a lack of endurance. I believe I could run more if I took a few Motrin but I'm uncomfortable with that idea.
Very addicting. Very therapeutic. I can think of great one-liners while running and then forget about them 2 minutes later !