
The psoas (pronounced so-as) is a core muscle that connects the lower spine to the femur, playing a critical role in maintaining posture and enabling movement such as walking, running, and bending. It is the only muscle that connects the spine to the leg and is located deep within the abdominal cavity, making it challenging to palpate and treat. Given its importance, understanding the psoas muscle and common issues such as adhesions can lead to better treatment and improved overall physical well-being. While it is rare to injure the psoas muscle, pain in the lower back or other symptoms should not be ignored, as they can indicate more serious health conditions.
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What You'll Learn

SOAS muscle anatomy
The psoas muscle is a long, ribbon-shaped muscle located in the lumbar region of the back. There is one psoas muscle on either side of the spine, starting in the lower back just below the ribs and running through the pelvis to the top of the femur (thigh bone). The psoas muscle is a core muscle that helps with posture and movement of the hips and upper legs. It is connected to the iliacus muscle, with which it forms the iliopsoas muscle group. The iliopsoas muscle is surrounded by the iliac fascia and runs through the pelvis to insert into the lesser trochanter of the femur.
The psoas muscle is a vital muscle for the body, playing an important role in back health and movement. It is a paraspinal muscle, meaning it is located deep in the body and close to the spine. The psoas muscle helps to stabilise the lumbar spine and pelvis, and assists with flexion and external rotation of the hip. It also plays a role in walking and running, as it helps to lift the upper legs towards the body.
The psoas muscle is made up of thousands of tiny fibres that work together to produce movement. These fibres receive blood from the lumbar arteries, renal arteries, common iliac artery, and deep circumflex iliac artery. The psoas muscle also has a nerve supply, receiving branches from the lumbar spinal nerves L1-L4 and the femoral nerve.
The psoas muscle can become tight or overstretched, which can lead to lower back pain and other issues. Releasing stress and tension in the hips can help to keep the psoas muscle healthy. Techniques such as walking, soaking in an Epsom salt bath, and massage can be beneficial for reducing stress and tension in the psoas muscle.
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SOAS muscle injuries
The psoas (SOAS) muscle may be the most important muscle in the human body, with one present on either side of the spine. It is used to move the lower back, hips, and upper legs.
Psoas syndrome refers to pain and inflammation caused by irritation, inflammation, or injury to the psoas or iliopsoas muscle group. This is often caused by overuse or trauma, and commonly affects athletes such as runners, dancers, and high jumpers. However, non-athletes can also be affected due to prolonged sitting, poor posture, or spinal conditions.
Psoas injuries are less common than other causes of lower back pain, but they share many symptoms and causes. Psoas pain can also be caused by infections or, rarely, certain kinds of cancer.
If you suspect you have a psoas injury, it is important to consult a healthcare provider or physical therapist before beginning any new exercises or stretches. They will be able to advise on the best course of treatment for your specific needs, which may include physical therapy or rest and avoidance of intense physical activity. In some cases, an MRI may be necessary to rule out more serious injuries.
To prevent psoas injuries, it is important to stretch and warm up before any physical activity and to increase overall flexibility. For those with existing psoas pain, a hot magnesium bath can help open up the fascia and prepare the muscle for a deeper tissue massage.
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SOAS muscle adhesions
The psoas (pronounced SO-as) muscle is a core stabilizer that connects the lower spine to the femur. It is considered to be one of the most important muscles in the body. The psoas muscle works closely with the iliacus muscle, together known as the iliopsoas.
Treating the soas muscle and addressing adhesions requires careful consideration and skill due to the muscle's depth and proximity to critical structures such as the abdominal aorta. One effective treatment technique involves performing treatment passes on the identified areas of adhesion. This involves applying pressure and moving along the muscle to break down adhesions and improve mobility.
To prevent adhesions, it is important to incorporate regular stretching and strengthening exercises into your routine to keep the soas muscle flexible and reduce the risk of adhesion development.
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SOAS muscle treatment
The psoas muscle (pronounced SO-as) is often considered the most important muscle in the human body. It is a core stabilizer that connects the lower spine to the femur and plays a critical role in maintaining posture and enabling movement such as walking, running, and bending. Located on either side of the lumbar spine, the psoas muscle stretches from the thoracic vertebrae to the femur and works closely with the iliacus muscle, together known as the iliopsoas.
Psoas syndrome is a rare condition that causes pain in the lower back, hips, butt, or groin. The pain may spread down the legs or worsen when trying to stand up straight. While psoas syndrome is uncommon, it is likely under-diagnosed due to its similar symptoms to other injuries or health conditions. The good news is that psoas syndrome typically responds well to treatments similar to those used for related issues.
If you are experiencing pain that does not improve within a week, it is recommended to visit a healthcare provider. They may diagnose psoas syndrome through a physical examination and, in some cases, additional imaging tests. Treatment for psoas syndrome typically involves rest and physical therapy.
Adhesions in the psoas muscle can be identified through physical palpation by a trained professional. Treatment passes are then applied to break down these adhesions and improve mobility. This involves the practitioner palpating the psoas muscle to identify areas of resistance and then applying firm but steady pressure while moving along the muscle's length. Given the depth and proximity of the psoas muscle to critical structures, it is crucial to seek treatment from a trained and experienced professional to avoid potential harm.
To address tight or overstretched psoas muscles, releasing stress and tension in the hips through daily stress-relieving practices and leisure activities can be beneficial. Taking a hot magnesium bath before a massage can also help open up the fascia for a deeper tissue massage.
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SOAS muscle stretches
Sitting for long periods of time can cause the psoas muscle to shorten and stiffen, leading to muscle imbalances and pain. To counteract this, there are several stretches that can help.
One stretch involves kneeling on the ground with both knees bent and your bottom raised off your feet. You then plant one foot in front of you, keeping your back straight and buttocks tight as you lean into the front leg. You should feel a deep stretch in the front part of the hip on the opposite side. Repeat with the other foot in front of you.
Another stretch is the camel pose, a yoga posture that helps open the hips. Start in a kneeling position with your buttocks resting on your heels, then place your hands on your hips. Lift your buttocks into a tall kneeling position, keeping your hips over your knees and your shoulders back. Arch your back and reach for your heels or ankles, holding for 30 seconds. Repeat this three times.
A third stretch is the glute bridge, which moves your hips into extension, stretching the iliopsoas muscles at the front of your hips. Lie on your back with your body near the edge of the bed. Bend the leg closest to the middle of the bed up to your chest and wrap your arms around it. Allow the other leg to dangle off the side of the bed, then repeat on the other side.
Additionally, the kneeling lunge is a great way to stretch the psoas muscles on both sides of the body. Begin in a half-kneeling position with your front foot flat on the floor and your back knee and shin touching the floor. Make sure your knees and hips are in line with your ankles, forming 90-degree angles.
Straight leg raises can also help build psoas muscle strength. Lie on your back with your legs straight, then bend one knee and place your foot flat on the floor. Lift the other leg slowly, keeping it straight, until your knee lines up with the bent knee. Hold for five seconds, then slowly lower your leg and repeat 20 times on each side.
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Frequently asked questions
The SOAS muscle, or Psoas muscle, is a core muscle that connects the lower spine to the femur. It is located deep within the abdominal cavity, close to major organs and arteries.
It is rare to injure the SOAS muscle, but you should not ignore pain in your lower back, especially if it does not get better within a week. Consult a healthcare provider or physical therapist for a physical examination. They will examine your back and hips and may recommend magnetic resonance imaging (MRI), electromyography (EMG), or an ultrasound to diagnose the issue.
Treatment for a SOAS muscle injury depends on the underlying cause. Minor muscle strains may only require rest and avoiding intense physical activities for a few weeks. A healthcare provider may suggest physical therapy, which involves stretches and exercises to strengthen the SOAS muscle and increase flexibility. Preventative measures, such as regular stretching and strengthening exercises, can help keep the SOAS muscle flexible and reduce the risk of adhesion development.











































