I thought up this exercise several years ago and included it in my glute eBook, but I never showed a video of them. I feel that biomechanically, this is one of the most similar ways to load the sprint pattern for horizontal power. Sure there are a whole-lotta muscles that are highly activated in a sprint, but the hip extensors appear to be the “rate limiting step” in terms of maximal speed production.
Moreover, the more forward the orientation of forces, meaning the greater the ratio of horizontal forces to vertical forces, the faster the sprinter. Finally, the better developed the velocity-side of the horizontal power equation, the faster the sprinter.