Hinge The Hinge series owns the deadlift derivatives that form a cornerstone of an effective strength programme. Fundamental to the hinge progression is the ability to maintain a neutral spine position under duress. By developing strength in a stiffened trunk position we can have a tremendous impact on both lumbar spine injury prevention and performance of our ability to transfer force through the body in the Kinetic Chain. This lumbo-pelvic control is perhaps the single most important skill that you need to develop. Because of this it builds roots into every exercise category in the SSOS.