The hip is a common site of osteoarthritis. To help protect the hip joint from "wear and tear," it is important to strengthen the muscles that support it. Your hip also controls the position of your knee, and strengthening your hips may be one component of your rehab program for knee pain. Your physical therapist may also prescribe hip exercises after total hip replacement if you have a hip labrum tear or as part of your hip exercise program for hip pain.
Some back pain is caused from a "ruptured disc". This pain is often experienced in the gluteal region of the body. Many people call this the "hip" region although it is not usually indicative of a hip joint problem. This is actually behind the hip, an important anatomic thought when considering hip pain, rather than in the hip itself. A condition related to degeneration of the lower back creating narrowing of the spinal canal or adjacent areas is called spinal stenosis and frequently causes pain in the hip region. The history of stenosis has to be compared with hip joint pain. Spinal stenosis can cause leg pain while walking as well as fatigue in the legs even when rising from a chair. Stenosis pain is relieved with sitting and will re-occur when walking is resumed.
A sedentary lifestyle can lead to having weak and tight hip flexors as they are always in the shortened position. Tight hip flexors can lead to a limited range of motion, poor posture, lower back and hip pain, and even injuries. These muscles need to get a workout when you are standing and doing movements such as raising your leg to climb stairs, run, or ride a bicycle.