If you have money you can get protein shakes from commissary at least here in Connecticut and plenty of other food items that make for a good source a protein and once your actually in prison and not in the county your usually going to get a couple recreation periods a day that last for 2 to 3 hours each so plenty of time to work out daily combine that with all the rest and sleep you can possibly need and you can basically eat whenever so if you wanna get huge you can definitely accomplish that