Amidst the relaxation of general legal restrictions on marijuana use, the drug remains banned by most athletic organizations. But can marijuana actually improve athletic performance? A one-man case study published in Outside magazine suggests the drug can increase pain tolerance and fearlessness, offering potential benefits in sports like endurance running and skiing. However, fearlessness can also turn to recklessness, which may lead to disastrous consequences when combined with impaired motor control. You can read the full study here.