This demonstrates how the Leader should stand.

Stand with feet together and knees slightly flexed, in an upright position.
When walking forward, make sure you can feel the change of weight from foot to foot, stepping first with the heel and rolling through the foot to the toe. When walking backwards extend the ankle and allow the leg to swing freely from the hip as the body weight moves backwards, keeping the toe in contact with the floor and rolling back through the foot from toe to heel.