PSO-RITE®Simple. Aggressive. Unmatched. The Pso Rite is the most revolutionary self care mobility tool of our time. The psoas complex (hip flexors) are considered to be the soul of our body. They regulate our fight or flight response, support our digestive organs, regulate our breathing, and aid in pumping blood and lymph through our body. Designed to be the shape of a therapists hand and the hardness of an elbow, you now have your own in house therapist to