Movement Lab said..
Awesome advice CarterSUP Physio-I see so many people do that stretch wrong, usually through pain avoidance!

I advise my athletes that need to do this stretch with their leg up on the top of a chair every night, (lets say right leg up), with the right hip committed forward as CarterSUP Physio suggested. I also find that often people will rotate the left hip forward, so keep the left hip rotated back so the hips are straight, and hold for one ad break. I've got some videos of a few stretches (that includes this one) that I was doing with Toby Cracknell that I've been meaning for ages to upload so if someone kicks me in the bum I will try to get to it. Just need to get my head around the whole youtube thing. I think with Toby, I also have a video of a version that I often do where you wrap a band around the back of the right leg, and lean back and drop the knee to the ground. Usually triggers a couple of tears in the eyes, as does the one CarterSUP showed when it's done properly. I like the gonads up cue-might not work so well with the ladies though ;)