Most facilities require that you are either in education, or you have a job. In most prisons, you can't litteraly lift "all day". But you can spend alot of time out there.
The chow hall cuisine is much like a school cafeteria. Decent to good sized portions of very carb heavy food. You can get tuna, canned ham, canned chicken and some canned fish from commissary, as well as beans, peanut butter and some other protein sources.
From what I hear (from former inmates) steroids are very rare on the yard. Whoever is bringing in the drugs, either dirty staff or visiting room, is going to want to bring in narcotics which will bring them much more money.
I did hear of one guy getting 10 bucks a pill for d-bol, which was brought in by dirty staff. A transaction like that goes like this, we both have people on the outside. You want 100 d-bol. Your people send my people $1000., when my people get the money, you get your stuff. High dollar transactions are done like that. A guy can only use so many postage stamps, you know?