Myth Busters: Can Your Pelvis Actually Go 'Out of Alignment'?

The Claim

"Your pelvis is out of alignment" is a phrase many clients have heard, usually accompanied by a manual test said to detect one side of the pelvis sitting higher, more rotated, or otherwise displaced relative to the other — a problem that treatment is then said to correct.

How Much Does the Pelvis Actually Move?

The sacroiliac joints do permit a small amount of genuine movement — nutation and counternutation of only a few degrees and a few millimetres of translation — stabilised by some of the strongest ligaments in the body. This is real, measurable motion, but it is a world away from the larger, more dramatic displacement implied by phrases like "out of alignment," and the joint is not capable of becoming meaningfully "stuck" out of its normal position in the way a dislocated joint can be.

The Reliability Problem

The more fundamental issue is whether clinicians can reliably detect pelvic asymmetry by palpation in the first place. In a study examining inter-examiner agreement on four standard static palpation landmarks used to assess pelvic position — the L5 transverse processes, sacral sulci, inferior lateral angles of the sacrum, and medial malleoli — two experienced physiotherapists independently examining the same 25 patients agreed with each other only 40-52% of the time, with kappa coefficients (a statistic that accounts for chance agreement) as low as 0.11 to 0.28 — figures the authors described as reflecting "doubtful utility" for continued clinical use of these tests to detect asymmetry (Holmgren & Waling, 2007). If two trained examiners palpating the same client at the same time cannot consistently agree on which side sits "higher," the finding says more about the limitations of manual palpation than about any genuine, reliably identifiable structural displacement.

What Might Actually Be Detected

This does not mean nothing real is present when a pelvis feels or looks asymmetrical. Genuine contributors include asymmetrical muscle tone (particularly in the gluteal and hip flexor groups), functional leg-length differences, scoliotic curvature, and simply normal anatomical variation between the left and right sides of the body — all of which are real and potentially worth addressing, just not via the "putting the pelvis back into place" framing that implies a mechanical fault requiring a mechanical fix.

The Verdict