He saw his physician 2 years ago, and he told him he would need a knee replacement in the future. This client has also been participating in the Insanity series, and has no trouble with the calisthenics portion. I’m looking for advice on lower body resistance training?
I would explore isometric exercises like wall sit’s from different knee angles. Maybe there are some pain free angles that he can hold, then sit onto a box when he’s tired. You could also do curls or some other exercises from that position as well. Good luck.