basically, i know the main places to inject are the glutes, bi's, tri's, even the pecks, my question is, are certains roids more benificial to the certain muscle you inject? if so which ones effect that muscle more then other? if the glute is the most common and populare muscle to inject, wouldnt that make your glutes big? i just need some clearification here, on other thing, what size syringe are used for the muscles such as bi's and tri's, what length?