The tension lines of the psoas major muscle typically follow its anatomical course and function. The psoas major originates from the transverse processes of the lumbar vertebrae (L1-L5) and the sides of the T12-L5 vertebral bodies and intervertebral discs, running down towards its insertion on the lesser trochanter of the femur. Tension lines in the psoas major would primarily follow this vertical or diagonal path, from the lower back and sides of the lumbar spine through the pelvis and down tow