I have a very solid frontflip (clean walkout each time) and I believe it is good enough to start twisting. Since I am 6' 1" I have found that I need a great deal more technique in my flips in order to land them. Twisting especially hurts my back and I know it is because I am doing something wrong. What are some progressions I can do to prepare my body for twisting, and once I am prepared for it, how to twist properly and without injuring myself?