The idea that cannabis enthusiasts are forever couchlocked is myth. We all know people who get high and get active. On this episode of Shaping Fire, host Shango Los speaks with neurophysiologist Greg Gerdeman, PhD about the interplay between our endocannabinoid system and exercise, cannabis's ability to focus our efforts to reach training goals, and the possibility that the endocannabinoid system evolved, in part, as a response to long distant running of our ancestors.