Pelvic Tilt

Quick answer: Pelvic tilt describes the pelvis tipping away from a level position: forward, backward, or to one side. Because the spine sits on the pelvis, its position affects posture both above and below it.

Also called: pelvic position, pelvic angle.

What are the types of pelvic tilt?

• Anterior pelvic tilt: the front of the pelvis tips forward, usually increasing the lower-back arch.
• Posterior pelvic tilt: the pelvis tucks under, usually flattening the lower back.
• Lateral pelvic tilt: one hip sits higher than the other.
• Pelvic rotation: one side of the pelvis turns forward relative to the other. See also pelvic asymmetry.

Is some pelvic tilt normal?

Yes. A slight forward tilt is typical, and the pelvis tilts constantly as you walk, sit and bend. It becomes worth attention when one position is pronounced, stuck, or uneven between sides, or comes with discomfort.

How can I check my pelvic tilt?

For a forward or backward tilt, try our anterior pelvic tilt tests. For uneven hips, see the mirror and stork checks in our lateral pelvic tilt guide.

How much pelvic tilt is normal?

More than most people are led to believe, and in a direction that may surprise you. A study in Manual Therapy measured 120 healthy, symptom-free adults and found anterior (forward) pelvic tilt in 85 percent of the men and 75 percent of the women. Neutral was the minority position — 9 percent and 18 percent — and posterior tilt rarer again, at 6 to 7 percent. Average tilt was around 6 to 7 degrees.

The author’s conclusion: “a degree of anterior pelvic tilt is typical within asymptomatic individuals and that asymmetry of pelvic angle is also not a unique finding confined to symptomatic individual alone.”

Two things follow. A forward-tipped pelvis is the ordinary adult arrangement rather than a defect, and a small side-to-side difference is also common in people with no symptoms. Being shown either on a photograph is not, by itself, a finding that explains anything.

Does pelvic tilt cause back pain?

The evidence does not support the usual version of that claim. Where lower-back curve has been compared directly, a systematic review and meta-analysis in The Spine Journal pooled 13 studies — 796 people with low back pain against 927 controls — and found the back-pain group had smaller lumbar curves on average, not larger (SMD −0.33 in age-matched studies).

That is a small effect, and the studies are cross-sectional, so nobody can say which came first; a back that has hurt for years is often held flatter. But it points the opposite way from the advice to flatten an exaggerated arch. And when exercise programs were tested against spinal curves, the pooled change in lumbar curve was not statistically significant (SMD −0.53, p = 0.401) even though the same review found a large significant change in the upper back.

Taken together: the position is normal, its link to pain runs backward from the folklore, and it is resistant to change. Which is why symptoms, movement and what you can comfortably do are better things to assess than the angle itself.

Which pelvic tilt page do you need?

“Pelvic tilt” covers movement in three different planes, and they are not the same question:

• Pelvis tipping forward (front down, back up) → anterior pelvic tilt
• Pelvis tipping backward (tucked under) → posterior pelvic tilt
• One side higher than the other → lateral pelvic tilt or uneven hips
• One side further forward than the other → pelvic rotation
• The curve of the lower back above it → lumbar lordosis or hyperlordosis
• Hips sitting forward of the trunk → sway back

What Does Change, and by How Much

So a tilt is a description rather than a diagnosis. What follows is what the research says does respond — and it is a considerably larger body of evidence than anything measuring pelvic angles.

The evidence base for exercise and movement in persistent low back pain is far larger than the evidence base for any postural measurement, and it is worth putting the two side by side. A Cochrane review pooled 249 trials and 24,486 participants. Against no treatment, usual care or placebo, exercise reduced pain by 15.2 points on a 100-point scale (95% CI −18.3 to −12.2), with moderate-certainty evidence, and that difference is large enough to matter to the person feeling it.

What was measured	Change with exercise	Evidence behind it
Pain (0–100 scale)	−15.2 points, clinically important	249 trials, 24,486 participants
Day-to-day function	6.8 points, a real improvement	Same review
The lumbar curve angle	Not the number that tracks progress (no significant change, p = 0.401), which is why progress is measured in pain and function	4 trials

Read that table as an instruction about what to measure. The angle is the outcome that does not reliably move. Pain is the outcome that does. A program judged on a photograph is being judged on the one thing least likely to change; a program judged on what hurts and what you can do is being judged on what the research says actually shifts.

Two honest qualifications, because the headline figure is specifically about exercise versus doing nothing. Compared with other active treatments the differences were smaller and did not reach the clinically important threshold, and exercise showed no advantage over manual therapy. It did beat education alone and electrotherapy. So the strong claim is that moving deliberately beats not moving — which is the comparison most people are actually choosing between.

On what kind of movement, a network meta-analysis of 217 trials and 20,969 participants found Pilates, McKenzie-style work and functional restoration produced the largest improvements, with Pilates reducing pain by 18.7 points (95% CI −24.4 to −13.1) against minimal treatment. But the authors’ closing advice is the part worth taking to heart: people with chronic low back pain “should be encouraged to perform the exercise that they enjoy to promote adherence.”

Which is why the useful targets are not shapes. What responds to this kind of work, and what is worth assessing and re-assessing, is: how much range of motion you have and whether it is comfortable through the whole of it; how much strength you have and where it runs out; how well the right muscles coordinate and fire when you load a position; how readily you learn a new movement pattern and hold onto it; and how much you can do before something complains. Those change, they are measurable, and they are what a person actually notices.

Sources

• Herrington L. Assessment of the degree of pelvic tilt within a normal asymptomatic population. Manual Therapy 2011;16:646–648. 120 asymptomatic adults.
• Chun SW, et al. The relationships between low back pain and lumbar lordosis: a systematic review and meta-analysis. The Spine Journal, 2017.
• González-Gálvez N, et al. Effects of exercise programs on kyphosis and lordosis angle: A systematic review and meta-analysis. PLOS ONE, 2019.

Related terms

• Anterior pelvic tilt
• Posterior pelvic tilt
• Lateral pelvic tilt
• Pelvic rotation
• Asymmetrical pelvis
• Hayden JA, Ellis J, Ogilvie R, Malmivaara A, van Tulder MW. Exercise therapy for chronic low back pain. Cochrane Database of Systematic Reviews, 2021. 249 trials, 24,486 participants.
• Hayden JA, Ellis J, Ogilvie R, et al. Some types of exercise are more effective than others in people with chronic low back pain: a network meta-analysis. Journal of Physiotherapy 2021;67(4):252–262. 217 trials, 20,969 participants.

Learn more and take the next step

Start with the guide that matches what you see: lateral pelvic tilt for uneven hips, or anterior pelvic tilt tests for a forward tilt.

If you’d like someone to look at what’s driving your posture, a free 30-minute consultation starts with a postural assessment, in one of our clinics or through virtual posture therapy.

This entry is general education, not medical advice. If you have pain, numbness, weakness, or a change in your posture that appeared quickly, see a physician first.