I dont smoke weed but know people who do while on, i don't think it affects your body any differently if your on or not, its not passing through your liver after all like alcohol does, its just damaging your lungs. I havent blazed in a long time but last time i did i was on test and drol and i thought my heart was gonna burst outta my chest lol, i dont respond well to it, dont know how some of my friends spend the whole day smoking bowl/joint after bowl/joint. If you feel like smoking a joint its certainly not going to kill you while on cycle or do any immediate damage. If you feel you need to let lose with some mind altering substance while on i would personally opt for weed (if it didnt make my heart feel like its going to explode).