Malcolm Gladwell said, "I'm only snobbish about running. Competitive runners disdain listening to music when they run; I want to at least give the impression I am listening only to my body."
I refuse to run with headphones for different reasons - it's my idea time. I get more ideas during a run than atany other time. The rhythm of my pace and breathing has a similar effect as zen meditation. It clears the mind. Oddly, this very active time for the body is a quiet time for the soul. And, by concentrating on nothing, my mind is quiet enough to notice when new ideas arrive. I would lose that if I ran with headphones, whether for music or news radio. I often don't notice how loud life is, that is, how many people and items of interest or vying for my attention constantly. Life is so noisy, until I run.