A good drill posted on Gymnastike. Click through to watch the video.
Technique Tuesday with Coach Barry Hyder of Capital Gymnastics. Barry has Mackenzie Brannan show a simple drill that teaches gymnasts to open their hips in the takeoff for double back saltos, full-ins, and double arabians.
Similarly, I like gainer backward somersaults. And “Cody” on trampoline.
Most coaches spend too much time worrying about the arms, not enough about an efficient opening of the hips.
Gymnastics Coaching.com 