I have an ElliptiGO. It's a standup bicycle. You don't pedal; you stride on it. It allows me to have the same striding motion as running without the impact.

Running unites us and brings us together because, in the words of the great Bill Rogers, "We sweat the same. We struggle the same." Running is a simple, primitive act, and therein lays its power. for it is one of the few commonalities left between us as a human race. Toeing the starting line of a marathon, regardless of the language you speak, the God you worship or the color of your skin, we all stand as equal. Perhaps the world would be a better place if more people ran.

When I ran across America, for 75 days I ate 10,000 calories a day. I still lost about five pounds.

I eat nothing that's processed or refined - no high-fructose corn syrup, no sugar, no trans-fats. I eat a lot of fish and monounsaturated fats from olives, olive oil and nuts. A lot of organic, fresh fruits and vegetables. No bread. No gluten. No wheat. No rice.

A lot of ultramarathoners are soloists. They're single and live lives off the grid.

I run because if I didn’t, I’d be sluggish and glum and spend too much time on the couch. I run to breathe the fresh air. I run to explore. I run to escape the ordinary. I run…to savor the trip along the way. Life becomes a little more vibrant, a little more intense. I like that.

I love surfing, rock climbing, cycling - all that stuff. But it's just amazing that I can inspire people with my running. It's humbling, really.