If it's your upper body that's in need of some major stimulation, add in pulling motions like pull - ups, chin - ups, or uneven pull - ups. (mindbodygreen.com)
It's not my favorite exercise, but given your situation it will be your best pulling motion. (gymjunkies.com)
This leads to uneven wear on the tires as well as that uncomfortable pulling motion you get when you try to steer opposite to the way that your wheels are stuck. (hendrickchryslerdodgejeepramofconcord.com)