Charles Arthur Salvador, better known as Charles Bronson, has served nearly 50 years in prison ... ups and the sit-ups,' he ...

Charles Bronson has been a Category A prisoner ... In 2002, he published Solitary Fitness, a guidebook on physical training in confined space. The film Bronson was released in 2008.

Charles Arthur Salvador ... There's something deep inside me that pushes me on. I'm a solitary fitness survivor.' Bronson recommends the following exercises as staples in any calisthenics plan.