Olympic track star Sha’Carri Richardson has been disqualified from competing in the Summer Olympics following a positive marijuana test. Though weed is legal both in city where Richardson used it (Portland) and in more than half the nation, the World Anti Doping Agency (WADA) still bans cannabis. But why? Is cannabis is a performance enhancing drug? Guest Josiah Hesse has spent years following the popularity of cannabis consumption in elite sports, culminating in the publication of his upcoming book RUNNER’S HIGH: How a Movement of Cannabis-Fueled Athletes Is Changing the Science of Sports.