Anatomy
The gluteus medius originates on the external surface of the outside of the ilium, aka, your hip bone. It traverses downward—narrowing as it goes—to insert on a rather large knob of bone located on the outside of the upper thigh bone, called the greater trochanter.
If you could visualize the gluteus medius muscle from the side, you’d see it as a fan shape that starts at the greater trochanter, where it looks a bit like a stem and widens up and out to cover the side of the hip bone in the area mentioned above.
It is innervated by the superior gluteal nerve that arises from lumbar level four, five, and sacral level one.
Function
The function of the gluteus medius muscle is to work with other muscles on the side of your hip to help pull your thigh out to the side in a motion called hip abduction. The gluteus medius also serves to rotate your thigh.
For example, when walking and lifting your left leg up and forward, the right gluteus medius is contracting to keep your body level. Failure for this to happen may result in gait abnormalities and tipping sideways while walking.
Associated Conditions
Injury to the gluteus medius is rare, but it can happen. Muscle and tendon tears might occur as a result of sports participation or falls. And a bursa, or fluid-filled sac, lies between the gluteal muscles and the bony prominence of your hip, and irritation may cause hip bursitis.
The gluteus medius may indirectly contribute to many other lower extremity problems. Weakness in this muscle group has been implicated in conditions such as:
Knee pain Patellofemoral stress syndrome (PFSS) Iliotibial band friction syndrome (ITBS) Hip pain
Weakness in your gluteus medius may cause your thigh to angle inwards and rotate abnormally during walking, running, and jumping. This may cause excessive stress through your knee and ankle and may place you at increased risk of injury if the weakness persists.
When this happens, your PT may call it a collapsing kinetic chain; your entire knee turns and bends inwards like it is collapsing. Some folks refer to this as dormant butt syndrome. Your glutes (butt) are not working properly, and your leg is getting in a bad position.
Rehabilitation
If you are having hip pain, knee pain, or any other lower extremity problem, your physical therapist should include a muscular screening of the gluteal muscles. If weakness is identified, specific exercises can be initiated to improve the function of the gluteus medius. These exercises may include:
Basic hip strengthening Advanced hip strengthening exercises The pelvic drop exercise
Learning how to use your glutes properly during high-level athletics that require jumping and quick motions is important too.
Hoping on one foot also requires strong hips and gluteal muscles, and your PT may incorporate this into your rehab program after hip, knee, or ankle injury.
Just be sure to speak with your healthcare provider or physical therapist before starting any exercise program to make sure it is safe for you to do.
A Word From Verywell
If you are having any sort of lower extremity problem, you may be surprised that your PT is checking your hip strength and the function of your gluteus medius. Don’t despair; significant evidence indicates that this muscle group is important in many day-to-day functions.
The gluteus medius is an important hip stabilizer that helps to control the position of your pelvis, hips, knees, and ankles. If you are having any lower extremity pain, check in with your healthcare provider and then visit your physical therapist to start on the right treatment for you. Ask your PT to check your glutes and make sure that they are functioning properly to help you get back to your normal, pain-free activity level.
