only from tums >>> the rio cosumnes correctional center near sacramento, robert overer ton serving oneby felony works hard to stay fit. he does push ups with his own jail house crafted blocks. >> just for to get depth in push ups. i don't think any of these are the bible. that would be -- what's the word, blasphemous. got to keep the chuck ladell look, you know what i mean? >> overton spends most of the days in the welding shop which he hopes will provide him the skills to stay out of the jail for good. >> it's like a sanctuary. i don't have to put up with the b.s. if i'm over here doing stuff, nobody bugs me. >> during breaks it's another quick workout. a previous inmate welder forged his own creation, a 70-pound dumbbell. >> this is my gym while i'm over here. it's not so obvious. when i'm done i move this back over here and i go back to doing work and nobody is the wiser. i'm 52. i figure i got another 50 in me, i hope. i try to take care of myself. if i do, i'm trying to make this next 50 better than the last, changing everything up a little bit, being there for my kids, my grandch