Is hip flexor the same as the psoas or iliopsoas?
The psoas and the iliacus come together as the iliopsoas and these are the hip flexors. When the psoas contracts it lifts bends your hip up, hence, hip flexor. If it was really tight and in flexion it would hold your hip and pelvis up. When your pelvis is held up by the abdominal muscles, it is much easier to lift your leg. When the pelvis is up, the SIJ is held into the position of self-bracing and is really strong and safe in that position. When the pelvis is tipped down with SIJD, the hip flexor is stretched and tight and it is harder to lift your leg up. It may actually hurt your low back because when you go to lift your leg the weight of your leg pulls down on the pelvis and makes it hurt more. Correct the SIJ.
