"Nationwide US studies report that, compared to non-users, cannabis users actually have a lower prevalence of obesity1. Intrigued, she began to investigate. Earlier this year, her team surveyed more than 600 cannabis users living in US states where the drug is legal about their exercise habits, among other health factors2. Four out of five respondents said that they use marijuana right before or after exercising. And those users spent more minutes per week exercising than users who didn’t mix the two. “We were shocked,” Bryan says."
https://www.nature.com/articles/d41586-019-02529-0
https://www.nature.com/articles/d41586-019-02529-0