High Runners?

Endorphins' role in "runner's high" has been dismissed, but a University of Beirut neuroscientist believes that he has identified the biological agent responsible for the feelings of calm and euphoria often reported by endurance athletes. The substance works on the same brain receptors as the psychoactive agent THC. "The natural chemical was discovered in 1992. It's called anandamide, from the Sanskrit word for "bliss." Anandamide is very similar to THC, and it produces pleasant feelings of relaxation and pain cessation similar to those often described by runners and pot smokers." http://www.runnersworld.com/article/0,7120,s6-243-297--1102-0,00.html