RT Book, Section A1 KISNER, CAROLYN A1 COLBY, LYNN A1 BORSTAD, JOHN A2 Kisner, Carolyn A2 Colby, Lynn Allen A2 Borstad, John SR Print(0) ID 1169778489 T1 The Hip T2 Therapeutic Exercise: Foundations and Techniques, 7e YR 2018 FD 2018 PB McGraw-Hill Education PP New York, NY SN 9780803658509 LK fadavispt.mhmedical.com/content.aspx?aid=1169778489 RD 2024/04/20 AB The hip is similar to the glenohumeral joint in that it is a triaxial joint, functions in all three planes, and is the proximal link to its extremity. In contrast to the highly mobile shoulder, however, the hip is a stable joint that is adapted for upright standing and weight bearing activities. At the same time, at least 120° of hip flexion and 20° each of abduction and external rotation are necessary to carry out activities of daily living (ADLs) in what is considered a "normal" manner.120 Because forces from the lower extremities are transmitted upward through the hips to the pelvis and trunk during gait and other lower extremity activities, and because the hips support the weight of the head, trunk, and upper extremities, the health of the hip joint is vital for most functional activities.