I'll go out on a limb & say there's different kinds of pain. If you are doing "cardio with weights" - ie. you can comfortably bench 100 lb, but you are doing 20

I'll go out on a limb & say there's different kinds of pain. If you are doing "cardio with weights" - ie. you can comfortably bench 100 lb, but you are doing 200 reps of 30 pound - that's pain A. If you can comfortably bench 100 lb but you try to do 1 rep of 300 lb, that's pain B. You want to feel pain B, so you won't blow your bicep. But you don't necessarily want to feel pain A, because that won't do you damage - its just getting in the way of finishing your workout, so you want to be zoned out. Most people trying to cut & get defined abs etc. are in the pain A basket, trying to repeatedly do insane amount of reps with very low weight. For them, cannabis might be a solution.