My knees are broken, no cartilage left in either one, but my ortho consultant is keen for me to wait another 5 years before having a double knee replacement (and realistically the wait on the NHS is about 5 years anyway) but I’m in so much pain now I need to strengthen. But the kicker is I can’t do any of the usual knee strengthening exercises like squats and lunges as they put too much load through my knee and the consultant says that’s doing more damage. Can anyone recommend any knee/leg work outs that don’t use squats and lunges? I really need to build my quads to support my knees. I can’t afford a gym or PT sadly.