A new documentary coming out about Cody Hodgson and the rare genetic disorder that ended his career. Explains a lot about his struggles and retirement after a promising start. Ex-Canuck Cody Hodgson releasing documentary about genetic disorder that ended his NHL career A year ago, Hodgson revealed to Sportsnet he was diagnosed with malignant hyperthermia, caused by a genetic mutation of the RYR-1 gene. In his case affects his muscular system and seems to be triggered by prolonged exercise. Doctors had told him he couldn’t play anymore. His final season was a literal struggle, he says in the trailer for the documentary. “I was having trouble breathing i was blacking out and my muscles were extremely tight. My whole body was just shaking,” he says. Now, he’s partnered with the RYR-1 Foundation and created a documentary about the disorder, and says he’s looking to raise awareness about it. The documentary will get its first screening in Toronto in early December.