Jetter, Hi and anyone with burning. I am 9 weeks out and trying to get my quads strong enough to lift my foot off the bed when I contract them and straighten the leg, pressing the knee down to the bed by contracting the quads. When I do that, and when I do a straight leg raise while contracting really hard to keep the leg straight at zero degrees, I get intense burning on the inside of my knee towards the top. The PT's don't know what to say but want me to continue because Ineed to wake up my quads more and get them stronger. Does anyone know anything more about if the burning sensation is a bad sign for damaging the knee or what?