The main steroid used by bodybuilders is testosterone. If you ever look at steroid forums, they always suggest that people start out with a testosterone-only cycle. Almost all cycles are built off a testosterone base. I would guess that testosterone in all its forms (cypionate, propionate, enanthate, etc) is the most abused steroid, but steroids are an umbrella term under which testosterone falls. But yeah, the steroid testosterone is the same thing we take...and bodybuilders take it on a schedule as well, usually once or twice a week, but at very high dosages. it provides the same long-term benefits to them as it does to us, except with more significant side effects, since they take such great amounts of it.