You’ve maybe never looked at your foot in this way, but the inner border is thicker than the outer border. This is the similar shape of an airplane wing that gets lift when the wing shape moves through the air fast enough.
Your foot must also kick back fast enough just as an airplane wing must have enough speed to get lift or pressure under the bottom of the foot. This is the application of Bernoulli’s Physics Principle very few coaches and instructors know about.
Essentially the bottom of your foot is flat and the top is slight curved. Water molecules like air over a wing on a plane take longer to get to the back end of the wing or your foot’s outer border. This creates a pressure gradient difference and molecules of water come from surrounding areas to fill this void and give lift or place pressure under the bottom of the foot while it is rapidly moving in a circular pattern.
To achieve this know that your leg thigh quadriceps muscles are very strong. Even a second grader knows they can’t jump very high if they start with their legs spread too far apart. To go directly forward you have to quickly extend the legs directly backward.
All you have to do is follow a subroutine sequence of easy-to-master one-minute steps and then chain them all together. The sequence will be jerky at first, but get more fluid as it is learned. That is what I show you how to do in this video.