Strengthen Neck Muscles while Improving Neck Posture with the Neck Curve Restorer - Cervical Curve Exerciser.;The Neck Curve Restorer exercises and strengthens the major muscles of the neck and upper back often producing lasting pain relief and significant improvement of forward head posture.;Brought to you by Hill Therapeutics, a Division of Hill Laboratories (Est. 1945). in conjunction with Dr. Calvin Hargis;Sturdy, Lightweight Design. Removable handles for easy storage and transportation. Forward Neck Flexion for Slimming and Toning the Neck Region under the Chin.;The neck strap tension should be increased with a progression of extension exercises. Simply pull the strap through the buckle to increase the tension. Neck extension exercises may not be suitable for all neck conditions. If you have a history of neck pain or discomfort, discuss with your medical provider if neck extension exercises will help your condition.