Pelvic rotation: what a rotated or twisted pelvis means, and what helps

A label from a hand test

A 'rotated' or 'twisted' pelvis usually means a therapist has judged, by feeling bony points, that one hip bone tips further forward or back than the other. It's a hand-test finding, not something seen on a scan.

Sources 1, 2, 3

Pelvises aren't symmetrical

Bone shape alone can make the landmarks on the two sides differ by up to 11 degrees, and 95% of healthy athletes in one study had some asymmetry.

Sources 4, 5

The tests are unreliable

Two examiners checking the same person agree little better than chance.

Sources 1, 2, 6

The joints barely move

The sacroiliac (SI) joints at the back of the pelvis move about 2.5 degrees and less than a millimetre, and manipulation didn't change their position on precise X-rays.

Sources 7, 8

Not linked with back pain

In 282 people, pelvic asymmetry had no meaningful link with back pain; a smaller study found weak links.

Sources 9, 10

Exercise helps, on both sides

Stabilising exercises eased pelvic girdle pain after pregnancy, and the European guideline recommends exercise. The aim is strength and control around the pelvis, the same on both sides, not realignment.

Sources 11, 12

Rotated, twisted or torsioned

In manual therapy, one hip bone (the innominate) is judged by touch to tip further forward or back than the other, called anterior or posterior innominate rotation. Studies measure it as the difference between the two sides in the slope of a line from the bony point at the front of each hip bone (the anterior superior iliac spine, or ASIS) to the one at the back (the posterior superior iliac spine, or PSIS).

Sources 5, 13

Upslip

One hip bone judged by touch to sit higher than the other. A real upward shift of half the pelvis is a kind of pelvic fracture, called a vertical shear fracture, and an emergency.

Sources 1, 14

Sacral torsion

The sacrum, the triangle of bone at the base of the spine, judged to be twisted between the hip bones. We found no study of how reliable this judgement is, beyond reviews of feeling the pelvis and spine, which find poor agreement between examiners.

Sources 1, 2, 15

Pelvic rotation when you walk

Your pelvis turns forwards and back on each side with every step. That's normal walking, not a problem. Pelvic rotation in a golf swing is a different thing, a skill this guide doesn't cover.

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Bone shape aloneStrong evidence

In 30 pelvises from donated bodies, held in the same position, the slope between the front and back hip-bone points ranged from 0 to 23 degrees, and the two sides differed by up to 11 degrees in slope and 16 mm in height, from bone shape alone.

Source 4

A spiral twistEmerging evidence

In 12 specimens measured in 3D, the asymmetry followed a spiral: the upper part of the pelvis turned one way and the front of the pelvis the other.

Source 18

In healthy athletesEmerging evidence

In 44 college athletes without symptoms, 95% had some asymmetry between the hip bones, and in 73% the right side tipped further forward. Nearly all had legs of slightly different lengths, only weakly related to the asymmetry.

Source 5

On CT scansEmerging evidence

In 323 people having CT (computed tomography) scans, the two halves of the pelvis differed in height by more than 5 mm in 5.3%, and by more than 10 mm in 0.6%.

Source 19

So a 'rotation' can be your shape

Most pelvises are a little asymmetric, so a 'rotation' found at a check-up can just be the shape of your bones.

Sources 4, 18

How therapists check

Examiners feel bony points at the front and back of the pelvis, compare the two sides, and watch how the points move in tests such as the standing forward bend (the standing flexion test).

Sources 3, 20

Examiners disagreeStrong evidence

Agreement between examiners is scored with a statistic called kappa, where 0 is chance and 1 is perfect agreement. For feeling the back of the pelvis it averaged 0.27 (8 studies), for uneven landmarks 0.09 to 0.13, 'slightly above chance' (10 studies), and for a set of 4 SI joint tests 0.11 to 0.23 (65 patients), so those authors advised against using the tests.

Sources 1, 2, 6

Across 49 studiesStrong evidence

Feeling for landmarks reached acceptable agreement in a third of studies. Tests that bring on pain did best, in about two thirds.

Source 15

Sensitive hands, unreliable testsEmerging evidence

Hands can sense differences of about 0.2 mm, yet pelvic palpation tests don't give the same answer from one examiner to the next.

Source 3

The standing forward bend testEmerging evidence

Examiners agree poorly on it without standardised training, and what it shows reflects the hips, pelvis and lower back together rather than SI joint movement.

Source 20

What the guideline saysStrong evidence

The European guideline on pelvic girdle pain recommends tests that bring on your pain. It doesn't recommend palpation tests of movement, X-rays or CT scans to diagnose it.

Source 12

The SI joints barely moveStrong evidence

The sacroiliac joints join the sacrum to the two hip bones. In 25 people with SI joint problems, measured with a precise X-ray method, they turned about 2.5 degrees on average (0.8 to 3.9) and shifted 0.7 mm, the same in painful and pain-free joints.

Source 7

Manipulation doesn't move themEmerging evidence

In 10 people, manipulation didn't change the joint's position on precise X-ray analysis, even though the hand tests went from 'positive' to normal afterwards. An older trial in 20 people, measuring from the outside, reported changes in hip bone tilt.

Sources 8, 21

SI joint pain: pain, not positionEmerging evidence

SI joint pain is diagnosed with tests that press on or stress the joint to see whether they bring on your usual pain. When 3 or more of 6 such tests were positive, they picked out 94% of people whose pain was eased by an anaesthetic injection into the joint, and correctly cleared 78% of those whose pain wasn't. Our SI joint pain guide covers it.

Sources 22, 12

Leg lengthEmerging evidence

A leg that looks shorter on a treatment couch, with bones the same length, is a functional difference, and it's often blamed on an uneven pelvis. In 44 healthy athletes, pelvic asymmetry and leg length were only weakly related, and feeling the hip bones misses the true difference by several millimetres. Our leg length discrepancy guide covers measuring.

Sources 23, 5, 24

Asymmetry and back painEmerging evidence

In 144 people with back pain and 138 without, pelvic asymmetry had no meaningful link with pain. A study of 28 young adults with back pain and 28 without found small links with two asymmetry measures.

Sources 9, 10

Asymmetry and musclesEmerging evidence

In 126 healthy people, pelvic asymmetry wasn't related to the activity of the tummy muscles at the side of the trunk.

Source 25

Pelvic girdle pain in pregnancyStrong evidence

It affects about 1 in 5 pregnant women. The NHS describes 'a stiffness of your pelvic joints or the joints moving unevenly', and the specialist physiotherapy network, Pelvic Obstetric and Gynaecological Physiotherapy (POGP), lists 'the pelvic girdle joints moving unevenly' among its causes. Neither says bones are out of place.

Sources 26, 12, 27

What 'joint position' means

The NHS says physiotherapy aims to 'improve your pelvic joint position and stability', with exercises for the pelvic floor, stomach, back and hip muscles, and POGP describes manual therapy to make sure joints 'are moving normally, or to correct their movement'. Because these joints move so little, we read this as control and stability from the muscles around the pelvis, not putting bones back (our editorial reading).

Sources 27, 26, 7

Exercise for pelvic girdle pain after pregnancyEmerging evidence

In 81 women, 20 weeks of physiotherapy built around specific stabilising exercises lowered evening pain by 30 points on a 100-point scale and more than halved disability, compared with physiotherapy without them, and the women still did better 1 year after the birth.

Source 11

Exercise or manipulationEmerging evidence

In 51 people with SI joint pain, exercise, manipulation and both together all reduced pain and disability. Manipulation was ahead at 6 weeks and exercise at 12, and by 24 weeks there was no difference.

Source 28

Gluteal control trainingEmerging evidence

In 48 people with back pain and a functional leg length difference, 6 weeks of gluteal control training (10 holds of 10 seconds per exercise, 3 times a week) eased pain more than trunk exercise. A hand-held measure of the difference in forward tilt between the two hip bones fell from 3.9 to 0.7 degrees, against 3.8 to 2.3. It's one small trial, measured by hand, with heat and traction given to both groups and no follow-up after 6 weeks, so it doesn't show that exercise makes a pelvis symmetrical.

Source 13

What the guidelines sayStrong evidence

The European guideline recommends information, reassurance and individualised exercise for pelvic girdle pain in pregnancy. For low back pain, NICE (the National Institute for Health and Care Excellence) recommends exercise, and manual therapy only as part of a package that includes exercise.

Sources 12, 29

Hands-on treatmentMixed evidence

Manipulation and mobilisation eased SI joint pain in the short term in small studies of low to average quality, and muscle energy technique had a small effect, too small to matter, on chronic low back pain (11 studies). Some small studies measured by hand report better pelvic alignment afterwards, but on precise X-rays manipulation didn't change the joint's position. A trial of manual therapy aimed at 'pelvic deviation' was a 30-person feasibility study, too small to show whether it works.

Sources 30, 31, 32, 8, 33

Repeated adjustments and home 'resets'

Being told to come back again and again to have your pelvis 'put back in' isn't supported, and no study shows that home 'pelvic reset' or muscle energy routines reposition the pelvis. They may ease pain like any movement, so treat them as optional, not a fix (our editorial advice).

Sources 8, 32

Belts

In pregnancy, NICE suggests considering physiotherapy for exercise advice, a non-rigid pelvic support belt, or both, and the NHS mentions support belts and crutches. Outside pregnancy, NICE says not to offer belts or corsets for low back pain.

Sources 34, 27, 29

A starting programme

The 25-minute routine below, 2 or 3 times a week for at least 6 weeks, the same on both sides, is our editorial starting point; the trials behind it ran for 6 to 20 weeks. The exercise lists below give the doses.

Sources 11, 13

In pregnancy and after the birth

Follow your midwife or pelvic health physiotherapist. Keep moves that spread your knees small if they hurt, and skip single-leg work that hurts at the front of your pelvis: the NHS lists standing on one leg and moving your legs apart among the things that can make the pain worse.

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Not warning signs

On their own, these aren't warning signs:

• Being told your pelvis is 'rotated', 'twisted' or 'out'.
• One hip bone looking further forward than the other in the mirror.
• A pelvis that clicks without pain.
• One leg 'measuring' shorter on a treatment couch.

Sources 4, 5

Call 999 or go to A&E

In people with thin bones (osteoporosis), even a fall from standing height can break the pelvis. Call 999 or go to A&E if:

• You have severe hip pain after a fall or injury.
• You can't walk or put weight on your leg.
• You have tingling or loss of feeling in your hip or leg after an injury.
• You have pelvic or hip pain after a high-energy injury, such as a car crash or a fall from a height.

Sources 35, 14

Back pain: call 999 or go to A&E

If you have back pain and any of these. In the US, call 911.

• Pain, tingling, weakness or numbness in both legs.
• Loss of feeling around your genitals or anus.
• Changes in your bladder or bowels, such as difficulty peeing, or peeing or pooing yourself.
• Changes in how your penis or vagina feels during sex, not being able to get or keep an erection, or not being able to orgasm.
• Chest pain.
• Back pain that started after a serious accident, such as a car crash.

Source 36

Get an urgent GP appointment or call 111

If you have hip or back pain and:

• The pain is severe and started suddenly, or is getting worse quickly.
• Your hip is swollen and feels hot, or the skin around it has changed colour.
• You have a high temperature, or feel hot, cold, shivery or generally unwell.

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See a GP

If hip pain stops your normal activities or sleep, keeps coming back, or hasn't improved after 2 weeks of looking after it at home, or your hip is stiff for more than 30 minutes after you wake up. For back pain, see a GP if it:

• Doesn't improve after a few weeks of looking after it at home, stops you doing day-to-day activities, or worries you.
• Comes with weight loss you can't explain, a lump or swelling in your back, or a change in the shape of your back.
• Doesn't improve with rest, is worse at night, or is worse when you sneeze, cough or poo.
• Is coming from the top of your back (between your shoulders), rather than your lower back.

Sources 35, 36

In pregnancy

Call your midwife or GP if you have pelvic pain and it's hard to move around, it hurts to get out of a car or turn over in bed, or it's painful going up or down stairs. Contact them urgently for back pain in the second or third trimester, or with a fever, bleeding from the vagina or pain when you pee, and call 999 if you lose feeling in one or both legs, your bottom or your genitals. Our pelvic girdle pain guide has more.

Sources 27, 37

After the birth

If pelvic pain goes on after your baby is born, ask your midwife, health visitor or GP about a referral to a pelvic health physiotherapist.

Source 26

Children

See a GP if your child has a limp and you're not sure why. Call 999 or go to A&E if a child gets sudden pain in the hip, knee or thigh, can't put any weight on the leg, or is unwell with a high temperature.

Source 38

"Your pelvis is out of place and needs putting back in."Strong evidence

The SI joints move only about 2.5 degrees and less than a millimetre. Manipulation didn't change their position on precise X-rays, even though the hand tests 'normalised', and the European guideline doesn't recommend the movement tests used to find it.

Sources 7, 8, 12

"Your therapist can feel a rotation."Strong evidence

Examiners agree little better than chance, and bone shape alone can make the landmarks differ by up to 11 degrees between sides.

Sources 1, 2, 6, 4

"A rotated pelvis causes back pain."Emerging evidence

Asymmetry wasn't meaningfully linked with back pain in 282 people, and a smaller study found only weak links.

Sources 9, 10

"Your pelvis is rotated, so one leg is shorter."Emerging evidence

Pelvic asymmetry and leg length were only weakly related in 44 athletes, and feeling for leg length is inaccurate. Blocks under the foot or a standing X-ray measure it.

Sources 5, 24, 39

"You need regular adjustments to keep it in."Emerging evidence

Manual therapy can ease pain for a while, but not by moving bones. Exercise did as well by 6 months in a head-to-head trial, and NICE advises manual therapy for back pain only alongside exercise.

Sources 30, 31, 8, 28, 29

"Pelvic girdle pain in pregnancy means your pelvis has slipped."Strong evidence

The NHS and POGP describe joints that are stiff or 'moving unevenly', not bones out of place, and their talk of joint position is best read as control and stability. The NHS says the pain tends not to get completely better until the baby is born, but treatment can ease it during pregnancy.

Sources 27, 26, 7

"An upslip is a common problem."Strong evidence

In manual therapy it's a hand-test finding, and those tests are unreliable. A real upward shift of half the pelvis is a pelvic fracture after a serious injury, and an emergency.

Sources 1, 2, 14