When I first got to the joint,I was about 145 pounds,I couldn't bench 135,so I was pretty weak.
My first year locked up I did straight calisthenics
Here was my routine:
Grab the stop watch and set it at 30mins and start it
I started off trying to complete 100 pullups,150 dips,150 body squats and 200 pullups within 30 mins or less,and everytime it got easier I added 2 reps to the pullups,5 reps to the dips,and 10 reps to the pushups and body squats. The best I ever got up to was 180 pullups,400 dips,450 pushups and 300 body squats in 30 mins,and knocked out 1,000 pushups every saturday in 45 mins.
The pushups and dips were done together,take a 5 min break,then the pushups and bodysquats were done together,and the 1,000 pushups saturdays were done alone.
For a year straight I did this with NO WEIGHTS and it cut me up something serious and gave me long wind,I was strong and in great shape,the first time I went back to the bench press I hit 135 like it was nothing,hit 225 easily and got a one rep of 300 pounds.
My squat,was about 275 ATG and 310 in the bucket(Prison slang for squating and making your butt touch the flat bench or a chair.)
But after I picked up the weights,I no longer did this crazy routine anymore,as I loved the weights.
But I just started this back up and started back from scratch and got 100 pullups,150 dips,150 body squats and 200 pushups in 20 mins breh's.
Try this,any questions feel free to ask.