How about a yoga pose similar to this one? I don't know if it's called the same thing the one that I do but it's a great quad stretcher! Basically you start by kneeling and sit back onto your heels, then slowly lean back to what's comfortable for you. I can get down all the way to the floor just like this picture only the feet stay under my rear at all times I don't put them to the side. Try it!
