Because the psoas major crosses the spine and hip joints, it is involved with pathomechanics of the spine and hip, making it one of the most important muscles in the human body to work with manual and movement therapy.
Gluteus Maximus Trigger Points and the Sacroiliac Joint
Functionally, the gluteus maximus is an important muscle primarily because of its pelvic posterior tilt concentric contraction function, and because of its isometric stabilization function to armor/protect the sacroiliac joint. Manual therapists should be mindful to especially assess the superior fibers lateral to the PSIS.
