During the 90/90 hip lift, the practitioner should feel hamstring engagement on both sides initially but the hip shift should isolate left-side inner hamstring and left groin muscle activation while minimizing right-side muscular tension.

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Evidence Quote

I'm going to have Trevor shift his right knee up and his left knee down which is going to move his hips and that's okay and then I'm going to have them pressed gently into the ball with just his left side not his right side so at this point he should feel his left inner hamstring and his left groin inner groin muscle engage the right side should have maybe a little bit of hamstring but not a lot of muscular tension

Source

The Secret To Psoas Tightness On One Side (why is no one talking about this?)Conor Harris
Created: 8/13/2026, 9:48:06 AM

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