flat feet are a consequence of something else

Why Flat Feet Are More Than Just a Foot Problem
By Grant Frost · Physiotherapist Last clinically reviewed: 10 March 2026


Your Wellness Nerd

Key insights: 60-second read

  • Flat feet are more than a foot problem – Collapsed arches are often the end result of an internally rotating leg, a valgus tendency driven by issues at the ankle, hip, or low back.
  • The "cure" must address broader mechanics – Arch supports and supportive shoes prevent collapse but won't stop the arch wanting to collapse if it's compensating for something else.
  • Three key areas – Stiff ankles, rotational hip muscle weakness, and lack of hip range of motion are the most common hidden issues.
  • Three exercises – The video demonstrates exercises to improve ankle, hip, and overall leg function, reclaiming good arch function.

Flat feet are more than just a problem with the feet. And without the right perspective, it can be hard to understand why your arches collapse.

So when trying to correct those fallen arches we don't want to miss these broader (and often relatively hidden) mechanical issues.

Clinically, flat feet are often the end result of an issue with the overall mechanics of the leg. More specifically, an internally rotating, valgus-type tendency. One that is insanely common in today's modern world.

This inward rotation is often a consequence of the leg working around a stiffness, tightness, or weakness at the ankle, hip, or low back. In my experience, the most common issues associated with flat feet are stiff ankles, rotational hip muscle weakness, and a lack of hip range of motion. Each forces the leg to rotate around their respective issues disorientating the leg from its ideal linear movement plane.

So, it goes without saying that the "cure" for flat feet must encompass techniques that address these broader issues as well. Otherwise, things like arch support and supportive shoes may prevent the arch from collapsing. But they will never stop the arch from wanting to collapse if it's constantly compensating for something else.

In today's video, I discuss these root causes of flat feet. I also demonstrate three important exercises to reclaim good arch function again by improving the overall function of the leg as a whole.

If you found this video useful please leave a like and let me know in the comments! Also, please consider subscribing to the Your Wellness Nerd YouTube channel for more helpful information.

– Grant

Related: Comprehensive ACL Injury Guide: Why Mobilizing Your Ankles May Save Your Knees (ft. AFL Star Nic Naitanui)

1. The Broader Perspective on Flat Feet

Flat feet are more than just a problem with the feet. And without the right perspective, it can be hard to understand why your arches collapse.

So when trying to correct those fallen arches we don't want to miss these broader (and often relatively hidden) mechanical issues.

2. The Internally Rotating Leg

Clinically, flat feet are often the end result of an issue with the overall mechanics of the leg. More specifically, an internally rotating, valgus-type tendency. One that is insanely common in today's modern world.

This inward rotation is often a consequence of the leg working around a stiffness, tightness, or weakness at the ankle, hip, or low back.

3. The Three Most Common Issues

In my experience, the most common issues associated with flat feet are:

  • Stiff ankles – Limits necessary range, forcing the leg to rotate inward to compensate.
  • Rotational hip muscle weakness – Weakness in the muscles that control hip rotation allows the leg to internally rotate excessively.
  • Lack of hip range of motion – Restricted hip movement, particularly in rotation, disorients the leg from its ideal linear movement plane.

Each of these forces the leg to rotate around their respective issues, disorientating the leg from its ideal linear movement plane.

4. The "Cure" Must Address the Cause

It goes without saying that the "cure" for flat feet must encompass techniques that address these broader issues as well. Otherwise, things like arch support and supportive shoes may prevent the arch from collapsing. But they will never stop the arch from wanting to collapse if it's constantly compensating for something else.

5. Three Exercises to Reclaim Arch Function

In today's video, I discuss these root causes of flat feet. I also demonstrate three important exercises to reclaim good arch function again by improving the overall function of the leg as a whole.

While the video provides the full demonstration, here's a summary of what each exercise targets:

  • Exercise 1: Ankle Mobility – Using a power band or lacrosse ball to restore ankle range, reducing the need for the leg to rotate inward.
  • Exercise 2: Hip Rotational Control – Strengthening the muscles that control hip rotation to prevent excessive internal rotation of the leg.
  • Exercise 3: Hip Range of Motion – Stretches and releases to improve hip mobility, allowing the leg to move in its ideal linear plane.

The order matters: first free up the restrictions (ankle and hip range), then strengthen the muscles that control rotation.

6. Helpful Equipment for This Video

Please note: These are affiliate links.

I genuinely hope this article offers a fresh perspective - or at least one useful takeaway. If you have a different issue, or simply want to learn more about how your body moves, head over to the Your Wellness Nerd YouTube channel. Subscribe if you feel inclined, and let me know in the comments what you'd like me to cover next.

– Grant

Frequently Asked Questions

What is the root cause of flat feet?

Clinically, flat feet are often the end result of an internally rotating leg, driven by issues at the ankle (stiffness), hip (rotational muscle weakness), or low back. The arch collapses as a compensation for broader mechanical problems.

Can arch supports fix flat feet permanently?

Arch supports may prevent the arch from collapsing, but they won't stop it from wanting to collapse if it's compensating for something else. The "cure" must address the broader issues - ankle, hip, and leg mechanics.

What exercises help flat feet?

The three exercises in the video target: 1) Ankle mobility to restore range, 2) Hip rotational control to prevent internal rotation, and 3) Hip range of motion to allow the leg to move in its ideal plane.

What equipment do I need for these exercises?

A power band, lacrosse ball, and foam roller are recommended. These tools help with ankle release, hip strengthening, and soft tissue work. Affiliate links are provided in the article.

One profound insight from this post

"Arch supports may prevent the arch from collapsing, but they will never stop it from wanting to collapse if it's constantly compensating for something else - like a stiff ankle or weak hip."

Living With Persistent Pain?

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Want personalised guidance?

If you'd like help making sense of your aches, pains, or ongoing symptoms, you can book with Grant either in Port Macquarie or via an online telehealth consultation.

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