Fulton wrote that while leptin is probably not the only thing controlling the high of running, the study "suggests that people with lower fat-adjusted leptin levels, such as high-performance marathon runners, could potentially be more susceptible to the rewarding effects of running and thus possibly more inclined to exercise."

Makes me want to hit the trails again just reading about it.

I really need to get back into the habit of hitting the road every few days like I did last year.