Anterior Pelvic Tilt

Quick answer: Anterior pelvic tilt is a posture in which the front of the pelvis tips forward and down while the back of the pelvis rises, which usually increases the arch in the lower back.

Also called: APT, forward pelvic tilt.

What does anterior pelvic tilt look like?

Illustration of anterior pelvic tilt, with the front of the pelvis tipped forward and an increased lower-back arch

From the side, the lower back arches more than usual, the buttocks appear to stick out, and the belly may push forward even without extra weight there. A small forward tilt is normal; it becomes worth attention when it’s pronounced or comes with discomfort.

What causes anterior pelvic tilt?

Common contributors include long hours of sitting, how the hip flexors and glutes share the work of holding the pelvis, and compensation for what’s happening above or below, such as the upper back or the feet.

Is anterior pelvic tilt the same as sway back?

Not necessarily. Sway back is defined by where the hips sit relative to the trunk, and it can occur with the pelvis tipped forward, backward or level.

How common is anterior pelvic tilt?

Far more common than most content on this topic admits, and that single fact should change how you read everything else about it. A study in Manual Therapy measured pelvic position in 120 healthy, symptom-free adults using a palpation meter, and found anterior pelvic tilt in 85 percent of the men and 75 percent of the women. Neutral was uncommon — 9 percent of men, 18 percent of women — and posterior tilt rarer still, at 6 to 7 percent. Average tilt was around 6 to 7 degrees.

The author’s conclusion is worth reading twice: “It would appear that 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.”

So anterior pelvic tilt is not a deviation from the norm. In an adult population without symptoms, it is the norm. If someone photographs you from the side and tells you that your pelvis tips forward, they have described the most common pelvic position there is. That finding on its own does not explain pain, and it is not evidence that something needs correcting.

What the Evidence Says About Pelvic Tilt and Back Pain

Here the research points in the opposite direction from the popular story, and it is worth setting out plainly.

The usual claim is that an exaggerated lower-back curve causes back pain. A systematic review and meta-analysis in The Spine Journal pooled 13 studies comparing 796 people with low back pain against 927 healthy controls, and found that people with back pain had smaller lumbar curves than controls, not larger (standardized mean difference −0.33, 95% CI −0.46 to −0.21 in age-matched studies). The association was stronger where disc herniation or degeneration was involved (−0.94).

Two honest qualifications. The age-matched effect of −0.33 is a small one, even though the authors describe the relationship as strong. And these are cross-sectional comparisons, so they do not establish which came first — a back that has hurt for a long time is often held flatter and more guarded, which would produce exactly this pattern.

What that leaves is a popular claim with the evidence pointing the wrong way, and a review of posture assessment in EFORT Open Reviews concluding that “consensus on the correct assessment of postures and the reliability of different assessment methods is still lacking.” Measuring a pelvis precisely does not yet tell anyone much about why it hurts.

Can you fix anterior pelvic tilt?

You can change how you sit, stand and move, and you can change strength and control around the hips and trunk. Whether you can change the angle is a different question, and the evidence is weaker than you would guess. The same meta-analysis that found exercise programs produced a large, significant improvement in upper-back curve found that the effect on lumbar curve was not statistically significant (SMD −0.53, p = 0.401, across four trials). Same review, same methods, two outcomes — and the lower back is the one that did not move.

Which is why the angle is the wrong target. A pelvic position shared by three-quarters to four-fifths of symptom-free adults, which is resistant to change and whose link to pain runs the opposite way from the folklore, is not a useful thing to chase. What is worth attention is the thing you actually came here about: whether something hurts, what brings it on, whether you can move in and out of positions comfortably, and what the hips, upper back and feet are doing. That is a different assessment from measuring a tilt.

If you have no symptoms and someone has told you your pelvis is tilted, the most evidence-based thing you can do is nothing.

What Does Change, and by How Much

All of the above is about a pelvic position, and positions turn out to be a poor thing to aim at. Movement is a different matter, and the evidence for it is substantially stronger than anything cited against the angle.

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 measuredChange with exerciseEvidence behind it
Pain (0–100 scale)−15.2 points, clinically important249 trials, 24,486 participants
Day-to-day function6.8 points, a real improvementSame review
The lumbar curve angleNot the number that tracks progress (no significant change, p = 0.401), which is why progress is measured in pain and function4 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.

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Related terms

Learn more and take the next step

To check your own pelvis at home and learn what can help, read our full guide: Anterior Pelvic Tilt: Tests You Can Try.

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.

Related reading: Pelvic Tilt, Uneven Hips and Lower-Back Posture: the complete guide.

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