Pretty simple man, I’ve done time, ramen noodles, cans of tuna, penut butter and so on… All these items you can purchase of commissary. And trust me when you ain’t got shit to do, your hitting push ups pullups dips burpees laundry bags full of books for bis, and I’m talking in the rep range if a 1000 plus a day. You do this for 10 years straight and your gonna blow the fuck up brotha