A study by UC Irvine and the Georgia Institute of Technology shows that the high you get from running and the one pot smokers get from lighting up are the same—and are caused by similar changes in brain chemistry

Men's Fitness, April, 2004

A study by UC Irvine and the Georgia Institute of Technology shows that the high you get from running and the one pot smokers get from lighting up are the same--and are caused by similar changes in brain chemistry. Researchers report that just an hour of mild to moderate running or biking may be enough to leave you with a natural (legal) high.