What is it, is it good/bad, all your questions answered.
If you’ve spent any time on social media or searched for back pain advice online, you’ve probably heard statements like:
- “Your anterior pelvic tilt is causing your back pain.”
- “Never arch your back.”
- “Always keep a neutral spine.”
- “Avoid rounding your back.”
These messages are everywhere, but they often oversimplify how the human body works. The reality is that anterior and posterior pelvic tilt are normal, healthy movements—not problems that need to be fixed.
Let’s break down what pelvic tilt actually is, why it happens, and why learning to move confidently through your full range of motion is far more important than trying to maintain one “perfect” posture.
What is anterior pelvic tilt?
Anterior pelvic tilt occurs when the front of the pelvis rotates downward and the back of the pelvis rotates upward. As this happens, the lumbar spine naturally moves into more extension, creating a larger arch in the lower back.
This isn’t a flaw—it’s simply how our joints are designed to move.
Every time you reach overhead, perform a squat, sprint, jump, throw a baseball, swing a golf club, or pick something up, your pelvis and lumbar spine are constantly adjusting together. The pelvis and low back function as a team.
Having an anterior pelvic tilt isn’t automatically good or bad. It’s simply one position your body is capable of using.
Is anterior pelvic tilt bad?
The short answer: No.
There is no strong evidence that simply having an anterior pelvic tilt causes pain or injury. In fact, many completely healthy people naturally stand with varying amounts of anterior pelvic tilt and never experience back problems.
The idea that everyone needs to “fix” their posture or eliminate anterior pelvic tilt has become one of the biggest myths in fitness and rehabilitation.
Pain is much more complex than posture alone.
Factors such as training load, strength, recovery, sleep, stress, previous injuries, and overall movement capacity play a much larger role than the angle of your pelvis while standing.
The problem with telling people to avoid anterior pelvic tilt
One unintended consequence of constantly cueing people to “tuck your pelvis” or “never arch your back” is that they begin avoiding lumbar extension altogether.
Over time, people may become fearful of extending their spine because they’ve been told it’s dangerous.
The body adapts to what it experiences.
If you rarely move into lumbar extension, you may gradually lose strength, mobility, and confidence in that position. Then, when life or sport eventually requires extension—reaching overhead, serving a tennis ball, performing a backhand, swimming, or simply standing up after gardening—that position may feel stiff, uncomfortable, or poorly tolerated.
The issue isn’t the movement itself.
The issue is that the body hasn’t been prepared for it.
Your spine is meant to move
The lumbar spine is designed to flex, extend, side bend, and rotate within its available range.
Like every other joint in the body, movement helps maintain tissue health, builds capacity, and improves resilience.
Rather than trying to eliminate lumbar extension, we should be progressively strengthening it.
Exercises such as:
- Roman chair back extensions
- Jefferson back extensions
- Prone press-ups
- Bird dogs
- Reverse hypers
- Hip hinges performed with controlled spinal movement (when appropriate)
can all help build tolerance to extension depending on the individual’s goals and symptoms.
The goal isn’t to force excessive extension.
The goal is to make your back strong and confident when extension naturally occurs.
What about posterior pelvic tilt?
Posterior pelvic tilt is simply the opposite movement.
The front of the pelvis rotates upward while the back rotates downward. At the same time, the lumbar spine naturally moves into flexion, reducing the arch of the lower back.
Again, this is completely normal.
Posterior pelvic tilt occurs during movements like:
- Sitting down
- Deep squats
- Bending over
- Picking objects up
- Rolling in bed
- Getting into your car
- Tying your shoes
It’s an essential movement pattern that we use every single day.
Is lumbar flexion dangerous?
Another common myth is that your back should never round.
While there are certain situations where temporarily limiting lumbar flexion is appropriate—such as during the early stages of some injuries—that doesn’t mean flexion itself is harmful.
In reality, avoiding lumbar flexion forever can create its own problems.
If someone spends months or years trying to keep a perfectly neutral spine during every activity, they may gradually lose their tolerance to bending and rounding.
Then, one day when they naturally flex their spine to lift a laundry basket, tie a shoe, or pick up a child, the movement feels threatening simply because it hasn’t been practiced.
Just like muscles become weaker when they’re not trained, tissues become less tolerant to movements they rarely experience.
We should train lumbar flexion too
A resilient back isn’t one that never flexes.
It’s one that has gradually built the capacity to tolerate flexion when life demands it.
Depending on the individual, exercises that can improve tolerance to lumbar flexion include:
- Jefferson curls (performed progressively)
- Cat-cow mobility
- Controlled segmental spinal flexion
- Deep squat mobility
- Loaded bending patterns introduced gradually
The goal isn’t to force extreme ranges or ignore pain.
It’s to progressively expose the body to normal movement so it becomes stronger, more adaptable, and less sensitive over time.
The takeaway
Anterior pelvic tilt isn’t bad.
Posterior pelvic tilt isn’t bad.
Lumbar extension isn’t bad.
Lumbar flexion isn’t bad.
They’re all normal movements that your body is designed to perform.
Instead of chasing a perfectly “neutral” spine or trying to avoid certain positions forever, focus on building strength and confidence throughout your available range of motion.
Healthy spines are adaptable spines.
They can flex when needed.
They can extend when needed.
They can tolerate movement because they’ve been trained to do so.
At BioPerformance Sports Physical Therapy, our goal isn’t to teach you to fear movement—it’s to help you build the strength, mobility, and resilience to move confidently in every direction that life and sport demand.