Maximus Gage
The hip joint is supported by 21 different muscles, each playing a role in its movement and stability. External hip rotation occurs when the thigh and knee rotate outward, away from the body. The gluteus maximus is the largest and most powerful external rotator muscle of the hip, providing most of the power for hip external rotation. Other muscles that externally rotate the hip include the psoas major, psoas minor, gluteus medius, gluteus minimus, tensor fasciae latae, piriformis, obturator internus, obturator externus, gemellus superior, gemellus inferior, and quadratus femoris.
| Characteristics | Values |
|---|---|
| Definition | External rotation of the hip occurs when the thigh and knee rotate outward, away from the body. |
| Muscles Involved | The gluteus maximus, gluteus medius, gluteus minimus, tensor fasciae latae, psoas major, iliacus, piriformis, obturator internus, obturator externus, gemellus superior, gemellus inferior, and quadratus femoris. |
| Muscle Groups | The gluteal muscles, iliopsoas muscle, and lateral rotator group. |
| Muscle Functions | The gluteus maximus provides most of the power for hip external rotation. The psoas major assists with external rotation of the hip. The lateral rotator group muscles all externally rotate the femur in the hip joint. |
| Innervation | The gluteus maximus is innervated by the inferior gluteal nerve (L5-S2). The gluteus medius and minimus are innervated by the superior gluteal nerve (L4, S1). The lateral rotator group muscles are innervated by the sacral plexus (L4-S2), except the obturator externus, which is innervated by the lumbar plexus. |
| Exercises | Various exercises and stretches can strengthen the external hip rotators and improve flexibility. |
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What You'll Learn
- The gluteus maximus is the most powerful external hip rotator
- The psoas major and iliacus muscles form the iliopsoas muscle, aiding hip external rotation
- The piriformis is part of the lateral rotator group of muscles
- The gluteal muscles are involved in hip external rotation
- Hip external rotation exercises improve hip mobility and stability
The gluteus maximus is the most powerful external hip rotator
The gluteus maximus is involved in several sports, from running to weightlifting. It is the main extensor muscle of the hip in humans, and its size and position make it uniquely suited for controlling trunk position during rapid movements and stabilising the trunk against flexion. During running, it helps control trunk flexion, aids in decelerating the swing leg, and contributes to hip extension. It is also important for activities like stair descending, squatting, and landing.
The gluteus maximus is larger in size and thicker in humans than in other primates. It is approximately 1.6 times larger relative to body mass compared to chimpanzees and comprises about 18.3% of total hip musculature mass, compared to 11.7% in chimpanzees. Its large size is one of the most characteristic features of the human muscular system, connected to the power of maintaining the trunk in the erect posture.
There are various exercises and stretches that can help strengthen the gluteus maximus and improve hip external rotation. For example, one stretch involves sitting on the floor with a straight back and extending the right leg out. Then, the sole of the left foot is placed on the right thigh, as close to the pelvic region as possible. The individual then leans forward, placing their palms on the floor on either side of the right leg and holds this position for 30 seconds before repeating on the other side.
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The psoas major and iliacus muscles form the iliopsoas muscle, aiding hip external rotation
The iliopsoas muscle is a large compound muscle of the inner hip, composed of the iliacus and psoas major muscles. The iliopsoas is the strongest flexor of the hip joint. The psoas major and iliacus muscles produce powerful flexion of the thigh at the hip joint when contracted simultaneously. The psoas major can also act independently, producing additional movements of the lumbar vertebral column.
The psoas major is a long fusiform muscle on either side of the vertebral column and the brim of the lesser pelvis. It originates from the twelfth thoracic and all five lumbar vertebrae. The iliacus, on the other hand, arises from the superior two-thirds of the iliac fossa, the iliac crest, and the lateral aspect of the sacrum.
The psoas major and iliacus are separate in the abdomen but join together in the thigh to form the iliopsoas muscle. Their fibres merge around the pelvic brim, and the iliopsoas ends in a tendon that inserts into the lesser trochanter of the femur.
The iliopsoas muscle is important for standing, walking, and running. It aids in the external rotation of the hip, allowing the thigh and knee to rotate outward, away from the body. The hip joint is the central pivot point of the body, enabling movements such as lifting the feet or reaching towards the ground.
The lateral rotator group, consisting of six small muscles of the hip, also contributes to external hip rotation. These muscles include the piriformis, gemellus superior, obturator internus, gemellus inferior, quadratus femoris, and obturator externus.
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The piriformis is part of the lateral rotator group of muscles
The piriformis is a flat, pyramidally-shaped muscle in the gluteal region of the lower limbs. It is one of the six muscles in the lateral rotator group, which externally (or laterally) rotates the femur in the hip joint. The other muscles in this group are the gemellus superior, obturator internus, gemellus inferior, quadratus femoris, and obturator externus. The lateral rotator group is responsible for rotating the femur and pointing the knee outward, away from the body.
The piriformis muscle originates on the front surface of the sacrum and inserts onto the greater trochanter of the femur. It is innervated by the piriformis nerve and lies almost parallel to the gluteus medius. The piriformis is a crucial landmark in the gluteal region, as it passes through the greater sciatic foramen and divides it into an inferior and superior part. This, in turn, determines the names of the vessels and nerves in this region.
The function of the piriformis is to stabilize the hip joint by steadying the head of the femur inside the hip bone's acetabulum. Additionally, it contributes to the external rotation of the hip joint and abduction of the thigh when flexed. This abduction is essential during walking, as it shifts the body weight to the opposite side of the lifted foot, preventing falls.
The piriformis muscle is also associated with piriformis syndrome, which occurs when the muscle irritates the sciatic nerve, causing pain in the buttocks and referred pain along the nerve, known as sciatica. This condition can be treated with progressive stretching exercises, massage therapy, and physical treatment.
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The gluteal muscles are involved in hip external rotation
The gluteal muscles are indeed involved in hip external rotation. The gluteal muscles comprise the gluteus maximus, gluteus medius, gluteus minimus, and tensor fasciae latae. The gluteus maximus is the most powerful external hip rotator muscle. The gluteus medius and gluteus minimus are also involved in hip external rotation, but only when the hip is flexed; when the hip is extended, they become medial rotators.
Hip external rotation is when the thigh and knee rotate outward, away from the body. It is a vital movement for the stability and flexibility of the hip joint, which is the central pivot point of the entire body. The hip joint supports the body's weight during movement and when standing. It also enables people to lift their feet or reach toward the ground.
The gluteal muscles are activated during hip external rotation exercises, particularly when the hip is flexed. However, the degree of activation depends on the hip joint position. For example, the upper part of the gluteus maximus and gluteus medius become internal rotators as the hip is flexed. Therefore, the activation of the gluteal muscles during external rotation exercises will depend on the angle of hip flexion.
There are various exercises and stretches to strengthen the hip external rotators and improve flexibility. For example, one stretch involves sitting on the floor with a straight back and extending the right leg out. Then, position the sole of the left foot on the right thigh, as close to the pelvis as possible. Lean forward, placing the palms on the floor on either side of the right leg and hold for 30 seconds. Repeat on the other side.
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Hip external rotation exercises improve hip mobility and stability
The hip is a ball-and-socket joint that allows the leg to rotate inward or outward. Hip external rotation is when the thigh and knee rotate outward, away from the body. The hip joint supports the body's weight during movement and when standing. It also enables people to lift their feet or reach toward the ground.
The gluteus maximus, a large muscle in the hip/buttocks area, is the most powerful hip external rotator. Other muscles that externally rotate the hip include the psoas major, the iliacus, the piriformis, the gemellus superior, the obturator internus, the gemellus inferior, the quadratus femoris, and the obturator externus.
Hip external rotator muscles are important for stability, movement, and injury prevention. These muscles can become weak due to prolonged sitting, injury, surgery, or inactivity, increasing the risk of injury. Therefore, it is important to strengthen the hip external rotators through exercises and stretches.
- Lie on your left side with your legs stacked and bent at a 45-degree angle. Prop your head up with your left arm and place your right hand on your right hip for stability. Keeping your feet together, open your legs by raising your right knee as high as you can without straining. Repeat 10-20 times before switching sides.
- Sit in a chair with your legs bent at a 90-degree angle and your feet flat on the floor. Place your hands on your knees and move your legs in opposite directions to open your hips. Hold this pose for up to 30 seconds.
- Start on all fours with your knees directly below your hips and your hands directly underneath your shoulders. Engage your core and keep your back straight and parallel to the ground.
- Active Externally Rotated Leg Lifts: Place your hands on the floor for support and lift your front leg away from the floor, trying to lift both the inside of your ankle and your knee at the same time. Repeat for a total of 10 leg lifts on each leg.
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Frequently asked questions
The muscles that externally rotate the hip are the gluteus maximus, gluteus medius, gluteus minimus, tensor fasciae latae, psoas major, psoas minor, iliacus, piriformis, gemellus superior, obturator internus, gemellus inferior, quadratus femoris, and obturator externus.
The gluteus maximus is the most powerful external rotator of the hip.
The inner hip muscles and deep external rotators are the piriformis, obturator internus, obturator externus, gemellus superior, gemellus inferior, and quadratus femoris.
The gluteal muscles are divided into two groups: large and superficial muscles, and small and deep muscles. The large and superficial muscles are the gluteus maximus, gluteus medius, gluteus minimus, and tensor fasciae latae. The small and deep muscles externally rotate the thigh at the hip joint and stabilize the pelvis.
