The Relationship of the Hip, the Low Back, and Knee
The hip is a very unique joint. The depth of the socket, the strength of the muscles and ligaments surrounding it, and the way it functions in weight bearing activities is unlike any other joint in the body. The focus this month is on the relationship between the hip and the rest of the body. The hip joint is a synovial joint, meaning it moves freely. It is a ball-and-socket joint that is made up of the femoral head (the “ball”) and the acetabulum (the “socket”). The ball is largely contained within the cup or socket, though there are genetic and cultural differences with regards to the depth and shape of the hip joint in any one individual. The relationship between the hip and the surrounding joints is intimate in that each joint affects the next. For instance, ankle pronation—or the inward rolling of the foot and ankle—results in a knocked knee, which can then shift the hip outwards. The pelvis then drops down on that side, the tailbone or sacrum becomes unleveled or sl...