I have bad tendinitis in my right elbow and when I do extensions at any angle, seated, standing, lying, to the forehead, behind the head, ez bar, super curl bar, straight bar, dumbbells, I get pain. The pain comes and goes one week I'll be okay and the next my elbow feels like it's about to snap. This is very frustrating because I want to add 3" to my arms, but I can't get past 40 lbs on extensions because of the pain. I am already doing close grip bench and bench dips, I am about to buy a small dip station next month so I can do weighted dips. Is there anything I can substitute for extensions? I can only workout at home so I don't have access to machines.