I have several homeboys who have been locked up for a number of years, so I was able to see the before and after.......they never used steroids in there and never mentioned ppl using steroids. They have told me that pretty much all they do is bodyweight exercizes every day with little or no rest days. I would think that this would lead to overtraining and would inhibit growth, not to mention the lack of proper diet. But for them and many others they know it seemed to work and they got pretty jacked from it.