This is so true. Is this how they measure Steve? My PT does mine with me laying down. It is so hard for me to pull my leg back from that position. I don't have the skinniest of legs, LOL. So, I wonder, if I can only get to 110 on my own laying down but say I could get 120 sitting on a chair why do they have to do it the hard way? In the hospital, that PT measured it with me sitting on the edge of the bed.You always get better ROM sitting in a chair and sliding the foot back.