An adjustable dog leash and associated obedience training methods are provided. The leash has clamps at opposing ends that can be affixed to a dog collar, belt loops, or other sections of leash. In between the clamps, a cord lock is disposed and engages with two sections of the leash length. When the cord lock is open, it can move freely, along the length, but when it is closed the lengths of the leash portions are temporarily set. A length of leash sectioned off by the cord lock forms an intermediate loop and has n o-ring disposed thereon. End clamps can be secured to the o-ring or the intermediate loop, forming two end loops. Either end loop can be wrapped around the trainers torso while the other loop is used as a slip lead for a dog. The cord lock configuration reduces the risk of injury-causing leash cinching during training.
