Also, I know that guys who are in prison kind of use this approach without knowing, who are naturally fat and get super shredded in a relatively short period of time. They train mostly calisthenics, intense, and frequently (because they no longer are able to use weights in prison). Their diet, I'd guess, would be around 900-1500 calories per day. I know a lot of guys come out of prison looking phenomenal, lean and shredded with good muscularity, but can never seem to hold their condition when they come out of the pen because of the overly-gluttonous portions that americans are served with, on top of fast food. They just blow up like fat american swines when they get out.