I would imagine forearm training would be critical since grappling is so important in self defense. This could be tricky if there are no bars to hang from.
I'm thinking the best training is probably fairly similar to football training... get big, fast, and strong. I'm just not sure gymnastic like training will do that (particularly as you gain weight that sort of training becomes fairly difficult).
Thus from my limited knowledge... I would probably do a ton of power cleans, power presses, and sand bag grabbing. Maybe some farmer walks. Probably no dead lifts while in prison though since that would just sap you and leave you weak for attacks. Maybe deadlifts prior to going in.
If you can do one-arm pressups and pullups - which Wade's training leads up to - you will be stronger than 99% of people who train with weights anyway.
I have no doubt about doing one arm pullups making you strong. I just recently accomplished this myself but I had to loose a ton of weight to do so (from 198 -> 168). When I lost the weight I got a lot weaker and less powerful (albeit I certainly look better). I have feeling my old fat self could take more physical abuse.
Here's some guy in a no weight stack prison, with a contraband phone showing off his exercise routine (and pics of the homemade water weights) https://youtu.be/WLmDkcb6JQE
From guards making a quick buck?
Inmates just made their own weights using a few layers of trash bags filled with water.
Prisons are full of very clever hacks borne by necessity.
It had from DIY tatoo kits to radios and all kinds of stuff done with whatever was available.
(Hmm, could be related to this: http://temporaryservices.org/served/projects-by-name/prisone... ).
A pushup is equivalent to benching roughly 64% of your body weight. So if we say one armed is similar to benching 128% of your bodyweight... That puts a person in the intermediate level of weight training.
http://www.exrx.net/Testing/WeightLifting/BenchStandards.htm...
in which population?