The 90/90 hip flexion position (90 degrees at both hip and knee) biases internal rotation of the pelvis and targets the hamstrings, adductors, and oblique muscles that collectively create posterior pelvic shift, pelvis rotation back, and leftward movement.
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Unidentified Speaker — The Secret To Psoas Tightness On One Side (why is no one ta… [qP1lYsMNgbg]Evidence Quote
“a great place to start is a 90 90 position meaning 90 degrees of both hip and knee flexion because 90 degrees of hip flexion biases internal rotation of the pelvis and it's also going to help us Target muscles that help create that internal rotation and also help create a shift of the pelvis back and towards the left those muscles are particularly your hamstrings which attach on the back of your pelvis help pull the pelvis back on that side your adductor muscles which when you are in 90 degrees of hip flexion help create internal rotation and a shift towards that side and also your oblique muscles”
Created: 8/13/2026, 9:48:06 AM
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