The method taught is to avoid "pulling" of the leash, not allowing the dog to walk with a tight leash.
By using the leash as a tool, not as a ball and chain, your dog won't immediately "run" away or stop paying attention once the leash is removed. The ideal enjoyable walking scenario is relaxed with a loose leash. You and your dog will learn this in "The Companion Concept © " system - FREE ON LEASH