He was locked up in solitary confinement for 23 hours a day. The camera peaked through the small hole in the steel door and you saw this man churning out squats with a makeshift sandbag on his upper back. His abs were heavily muscled and shredded. His upper body looked like it was carved from stone. Veins ran all over him and each muscle was chiseled.
As the camera filmed, he dropped down with his squats at high speed and exploded back up, rep after rep. Then he'd do straight leg sit-ups with his ankles secured on top of a bench in his cell. This man did sit-ups old school: hands clasped behind the head, legs straight, up and down quickly. His body went below parallel until his head almost touched the ground.
The guards feared this man because he'd break out of his handcuffs every single time they'd put a pair on him. In addition, he ripped through his straightjacket, which was supposed to be made of indestructible material!
I'm sure the rest of his workout included more sandbag training such as military presses, cheat curls, rows, and shouldering. With his upper body so developed, it was a given he was doing handstand push-ups throughout the day.
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