Conor Harris Profile picture
Aug 18, 2025 12 tweets 4 min read Read on X
Most people think anterior pelvic tilt, or hyperlordosis, is caused by:

•Tight hip flexors
•A tight low back
•Weak abs & glutes

But that’s just scratching the surface.

Understanding the real cause leads to better resulting fixing it 👇 Image
The overlooked question:

👉 Why are these muscles tight or weak in the first place? Image
With APT, the center of gravity of the pelvis + lower body shifts forward.

This pushes the pelvis down into hip flexion.

As a natural byproduct:
•Hip flexors get tight
•Low back gets tight
•Abs & glutes lengthen → weaken
The reason the pelvis tilts forward is usually because it’s looking for a way to create compensatory internal rotation - a very commonly limited range of motion in many people. Image
That’s why so many people fail to fix APT long term.

They keep stretching hip flexors and “activating” glutes… but those muscles are just reacting to a deeper skeletal issue.
Key concept:

Skeletal position dictates muscular function.

If bones are positioned poorly, muscles adapt to that new position, and their function can even change accordingly.
So the real fix for anterior pelvic tilt is restoring your center of gravity back onto your heels and stacking:

👉 Head → ribcage → pelvis → feet
Here’s a simple drill to start:
1.Stand ~1 foot from a wall, feet hip-width apart.
a ball between thighs + hold a chair in front.
3.Keep eyes straight, most of your back flat on the wall. 2.Place
Now:

•Evenly feel heel + big toe + pinky toe on both feet.
•Slightly bend knees until pelvis is gently against wall.
•Reach chair forward (don’t slouch).
•Keep mid & low back on wall.

Breathing:
•Exhale fully through mouth (5–10 sec) → feel side abs engage.
•Pause, then close mouth.
•Inhale silently through nose (don’t lose abs).

Do 5–10 breaths.
This drill shifts your pelvis back, re-centers your weight, and restores the skeletal foundation so muscles can actually function properly.

Stop chasing “tight hip flexors.”
Fix the root: center of gravity + skeletal stack.
Keep in mind there’s nothing inherently wrong with anterior pelvic tilt, as many people have it.

In fact, most of the population does to some extent.

But as I touched on in this thread, it can be indicative of potential significant movement limitations, which it then can matter. But many people live with it with no problems.
If you enjoyed this thread, I have a newsletter with exclusive free education.

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✅Exercises that get results fixing mobility & pain
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More from @Conor_Harris_

Jan 21
The reverse plank might be the single most underrated exercise for fixing slouched posture (thoracic kyphosis).

Why?

Because it addresses the real underlying issues at both your shoulders and hips.

Here’s why it works, and how to do it 🧵 Image
Most people think “fixing posture” is about pulling your shoulders back.

That’s not the case.

Slouched posture often stems from:
•Limited hip extension - the ability to get the legs under us properly
•Limited thoracic extension - secondary to a tight front ribcage
The reverse plank fixes these by:

✅ Driving hip extension with the glutes & hamstrings
✅ Moving your arms behind your body into extension
✅ Opening the chest & elevating the sternum
✅ Restoring front-side ribcage expansion
Read 10 tweets
Sep 3, 2025
The Tibialis Posterior is one of the most underrated muscles for fixing knee, ankle, and foot pain.

Weakness here shows up in countless injuries - yet most rehab overlooks it. Let’s break down why it matters & how to train it 👇 Image
1️⃣ Why it’s so important
Research links a weak tibialis posterior to ankle & foot pain.

This muscle originates on the back of the shin and runs behind the medial ankle, under the foot. Its unique position makes it essential for arch control.
2️⃣ Controlling pronation
When your foot hits the ground, the arch naturally lowers (pronation).

The tibialis posterior decelerates this motion so it happens in a controlled, healthy way. Weakness = arch collapses too far, too fast.
Read 10 tweets
Sep 1, 2025
Struggling to squat deep without buttwink or your back rounding?

Most people blame it on ankle mobility… but that’s only part of the story.

Here’s what you need to know to fix your squat at the root cause 🧵 Image
The real question: why is ankle mobility limited in the first place? Image
One underrated reason 👉 Your body’s center of gravity is shifted forward.
Read 12 tweets
Aug 29, 2025
Most people are missing one key piece of hip mobility.

And if you don’t have it, your low back is the one paying the price.

Let’s talk about hip extension 🧵 Image
Hip extension = your ability to bring your leg fully under you and slightly behind you.

It’s one of the most commonly limited motions I see when assessing clients. Image
Why does it matter?

If you can’t extend at the hip, your body will find a workaround:

👉 Arching the low back instead.
This creates repetitive stress on the spine.
Read 9 tweets
Aug 25, 2025
Most people think Sciatica is caused by a tight piriformis muscle.

But the piriformis is usually just the messenger, not the root problem.

Here’s what’s really going on (and how to fix it)… 🧵 Image
Most people with sciatica think the issue is their piriformis muscle being too tight and pressing on the sciatic nerve.

So, they stretch it or roll it out for temporary relief…

But that tight piriformis is usually just a symptom of something bigger. Image
The real problem often starts with your body’s center of gravity shifting forward. This is what I commonly see in my clients with Sciatica.
Read 13 tweets
Aug 20, 2025
One of the most overlooked culprits in stubborn low back pain?

👉 The Quadratus Lumborum (QL).

It’s tight, overactive, and pulling your spine out of balance more often than you think.

Here’s why it matters and how to fix it 🧵 Image
First, it’s key to understand that the QL runs between your pelvic crest and lowest rib. Image
When it gets short and tight, it has 2 main effects:

•Both sides: compress + extend your low back (arching)
•One side: side-bend the spine, pull the shoulder down + hike the hip up
Read 11 tweets

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