Because the hip hinge pattern is so integral to movement, at Movement Training by Design it is very frequently one of the objectives we identify to help a client with. The two most common impediments we run into when teaching a client the hip hinge pattern are limited mobility/stability of the Thoraic spine (the middle of the spine), and limited hip mobility/stability, usually identified with tight hip flexors (muscles that pull your knees toward your chest), which limits your ability to move your thighs backwards (extension), or your torso backward without extending through the spine.
A client should be able to stand upright with a dowel rod along the spine so that the dowel maintains contact with the head, between the shoulder blades, and the sacrum (buttocks).
Beginning in the upright position a client should be able to sit the hips back without the knees moving forward moving the torso toward the floor while maintaining all 3 contact points (photo below, left). If the client cannot get the dowel to make contact with all 3 points in the upright position, or loses contact with one of these points such as when we see the middle of the spine round off as the client flexes the hips, we suspect some kind of mobility issue with the thoracic spine (photo below, right).
Read about some of the ways Movement Training by Design can help a client correct any issues in Hip Hinge Part 3: Training the Hip Hinge