Final answer:
Hip dysfunctions observed by a coach can include balance and posture problems, task execution difficulties, and personality changes. Common hip disabilities are caused by osteoarthritis, leading to pain and reduced joint mobility. Fractures within the hip joint capsule can cause avascular necrosis.
Step-by-step explanation:
Various major dysfunctions of the hip that a coach can observe are balance and posture problems, difficulty with planning and executing tasks, and personality changes. The hip joint is a multiaxial ball-and-socket joint that provides stability and a wide range of motion essential for weight bearing and locomotion. A common cause of hip disability is osteoarthritis of the hip joint, which leads to pain and loss of joint mobility. Moreover, the rheumatoid arthritis, an autoimmune disorder, affects the hip by causing inflammation and joint damage. A consequence of a fracture within the capsule of the hip joint such as a fracture of the femoral neck can lead to avascular necrosis due to disrupted blood supply.