The psoas stretch primarily targets the iliopsoas muscle group, which is composed of the psoas major and iliacus muscles. The psoas major originates from the lumbar vertebrae and inserts into the femur, while the iliacus originates from the iliac fossa and inserts into the femur. Together, these muscles flex the hip joint and are responsible for stabilizing the lumbar spine.

The benefits of a psoas stretch include increased flexibility in the hips, improved posture, and reduced back pain. It can also help to reduce stress and tension in the lower back and abdomen. Additionally, stretching the psoas can help to improve circulation and reduce the risk of injury.

It is recommended to do a psoas stretch at least once a day. However, depending on your individual needs, you may need to do it more or less often. If you are experiencing tightness or discomfort in your psoas muscle, it is best to stretch it more frequently.

The risks of a psoas stretch include: 1. Straining the psoas muscle: Overstretching the psoas muscle can cause strain and pain. 2. Compressing the lumbar spine: If the stretch is done incorrectly, it can compress the lumbar spine, leading to lower back pain. 3. Damaging the psoas tendon: If the stretch is done too aggressively, it can damage the psoas tendon, leading to pain and inflammation. 4. Nerve compression: If the stretch is done too aggressively, it can compress the nerves in the area, leading to pain and numbness.