I don’t know about it being performance enhancing. However, being high for strenuous workout or weightlifting is enjoyable. Yardwork as well. Zone out, put the headphones on and get some hard work done where you don’t have to think too hard.
I am not a consumer of marijuana but I was given an edible for exercising with a mate and it did help with pain and feelings of shyness. I enjoyed the workout but I just cannot use it because of my job.