What is the psoas?
The psoas muscle primarily flexes the hip and the spinal column. At about 16 inches long on the average, it is one of the largest and thickest muscles of the body. This powerful muscle runs down the lower mid-spine beginning at the 12th thoracic vertebrae, connecting to all the vertebral bodies, discs, and transverse processes of all the lumbar vertebrae down across the pelvis to attach on the inside of the top of the leg at the lesser trochanter. The lower portion combines with fibers from the iliacus muscle, which sits inside the surface of the pelvis and sacrum, to become the iliopsoas muscle as it curves over the pubic bone and inserts on the lesser trochanter. What is the function of the psoas? The psoas muscle has a number of diverse functions, making it a key factor in health. The psoas as a hip and thigh flexor is the major walking muscle. If the legs are stationary, the action of it is a bend the spine forward; if you are sitting the psoas stabilizes and balances the trunk. Th
