Being stoned can improve certain activities, such as auditioning for a Takis commercial. Other situations are best avoided, such as legal depositions or, one would think, working out.
So I was suspicious when a friend told me that he prefers lifting weights when high. As does Joe Rogan. They claim that being baked helps improve their form by allowing them to feel how specific muscles engage — instead of trying to figure it out by looking in a mirror, which you cannot do while high due to giggling.