Hi all. A bit of background info first. I started martial arts about 5 years ago. Before MA i was pretty inactive, and extremely stiff. I could barely reach below my knees, touching my toes was always some unattainable dream. However, with diligent practice and stretching, my hamstring flexibility is pretty good. After a good warm up, I can touch the palms of my hands to the floor. Anyhow, my horizontal(?) flexibility (which I think involves hip and groin flexibility?) has not advanced at the pace I would want. Although I can get my side kicks and roundhouses fairly high, I want more. So, I turn to you for help. My biggest concern however, are my knees. 5 years on, and I still cannot perform the butterfly stretch correctly. I have not seen any progress in that stretch at all. Why is this? I cannot bring my knees to the floor. I have terrible knee flexibility, any good stretches or exercises? I dont have bad or weak knees, just really stiff ones. Thanks for the help and forgive the lengthiness.