Rope skipping is just low maximum 1-2 inches from the floor, including putting stance while jumping. To open the heels Use the feet with knees bent and weight a little bit.
And a rope swing Dock jumping is required. Elbow must be attached to the trunk and using only wrist rotation only, the rope swing is a circle. Without a flare sleeves and shoulders, arms or logs help rotate at all, which helps to keep the rope with a continuous smooth rotation and rotational speed control of the rope as high as you want.