Overpronation or Supination: How Do You Tell Which One You Have?
Overpronation means your foot rolls too far inward with each step. Supination (also called underpronation) means it rolls too far outward. Both change how force travels up through your ankle, knee and hip. You can work out which pattern you have by checking how your shoes wear, doing a wet foot test, or having a standing whole-body scan.
Key points
- Overpronation is far more common than supination, but both cause problems higher up the body.
- Shoe wear and the wet foot test give useful clues at home.
- A standing, weight-bearing scan shows the foot, the ankle and full lower limb alignment in one image.
- EOS imaging uses about 90% less radiation than a standard X-ray, around ten times less.
- ScanAlign is a diagnostic clinic. It does not prescribe treatment, but its imaging helps guide what comes next.
What is overpronation and what is supination?
Pronation is a normal part of walking. When your heel hits the ground, your foot naturally rolls slightly inward to absorb the shock. This movement happens mainly at the subtalar joint, just below the ankle.
Overpronation happens when the foot rolls inward too much. The arch flattens more than it should, and the ankle drops towards the midline. This is the more common pattern.
Supination (sometimes called underpronation) is the opposite. The foot stays rolled outward through the stance phase of the gait cycle. The arch stays rigid, and less shock is absorbed.
Neither pattern happens on its own. When your foot rolls one way, it twists the tibia (shin bone). This changes how the knee tracks, where the hip sits and even how your pelvis sits. Because of this connected chain, foot alignment problems can cause pain in places you would never link to your feet.
How do you know if you overpronate or supinate?
You can often spot clues yourself. Look at your shoes and notice where you feel discomfort.
What causes overpronation or supination?
Both patterns can be inherited, can develop over time, or can be linked to other alignment problems higher up the body.
Your body works as a connected chain. A hip or pelvic problem can make your foot compensate, and a foot problem can make your knee or hip compensate. Pain often shows up away from its real source. Understanding postural sway and balance can help explain why standing assessments matter.
Can you do a pronation test at home?
Yes. Two simple checks give a rough idea of your foot type. They cannot show the full picture of what is happening higher up.
How to do it: Wet the sole of your foot and step onto a piece of dark card or a paper bag. Step off and look at the print.
A flat, wide print (almost the whole sole showing) suggests overpronation. A narrow print with a thin or missing arch strip suggests supination. A moderate curve is closer to neutral.
This test shows the shape of your arch while still. It does not show what your foot does when it moves. That is why a full gait analysis explained in detail can add more context.
How to do it: Put a well-worn pair of everyday shoes on a flat surface. Look at the soles from behind.
Wear on the inner edge points to overpronation. Wear on the outer edge points to supination. If the shoe leans clearly to one side, this confirms the pattern.
This is a useful quick check. But it only shows the end result of how you move, not the cause.
Why does a standing scan show more than a lying-down scan?
Most imaging, including standard X-rays, CT and MRI, is done while you lie down. When you lie flat, gravity is taken away, your muscles relax, and the foot, ankle and leg sit without load. This can hide how your joints really behave when you stand and walk.
An EOS scan takes a full-length, weight-bearing image from your feet to your head while you stand naturally. It captures the subtalar joint angle, tibial rotation, knee tracking and hip alignment in one exposure. It uses about 90% less radiation than a standard X-ray, around ten times less.
This matters because a pronation or supination problem that looks mild without load may be significant when your full body weight is on it. The scan gives your doctor or therapist precise information to guide decisions about orthotics, footwear, physiotherapy or further tests.
Would you like to see how your feet, knees and hips line up under your own body weight? Book an alignment assessment at ScanAlign, private standing EOS imaging in London.
When MRI is the better choice: EOS shows bones, joints and alignment clearly. If your doctor or therapist suspects soft-tissue damage, such as a torn tendon, a ligament injury or nerve compression, MRI is usually the better tool. The two types of imaging work well together.
What helps manage overpronation or supination?
The right approach depends on how severe it is, what is causing it, and what is happening elsewhere in your body. Common options include the following.
- Suitable footwear. Motion control or stability shoes can help overpronation. Neutral, cushioned shoes suit people who supinate. A proper assessment makes sure you choose the right type.
- Custom orthotics. Insoles prescribed on the basis of accurate imaging can support the arch or correct rearfoot motion more precisely than ready-made ones.
- Targeted strengthening. Physiotherapy exercises for the foot, ankle and hip muscles can improve control through the gait cycle.
- Whole-body alignment review. The foot does not work on its own. Looking at the full chain of alignment helps find the root cause rather than just treating the symptom.
ScanAlign provides the diagnostic imaging to support these decisions. It does not prescribe or give treatment directly.
Before you start a treatment, or change the one you are on, it is worth getting a detailed diagnosis. Knowing whether the cause lies in the pelvis, the legs or the spine changes what will actually help.
Frequently asked questions
Check the soles of a well-worn pair of shoes. If the inner edge is worn down, you likely overpronate. If the outer edge is worn, you likely supinate. A wet foot test on dark card also gives clues about the shape of your arch.
Yes. Overpronation is significantly more common. It is linked to flat or low arches, which affect a large share of the population. Supination is less common and is seen more often in people with high, rigid arches.
It can contribute to it. When the foot rolls inward too far, the shin bone rotates. This changes how the knee tracks and can change the position of the hip. Pain often appears above the foot rather than in the foot itself.
Stability or motion control shoes are designed to reduce too much inward roll. But the right shoe depends on how much you overpronate and what is happening higher up your body. An alignment assessment can help guide that choice.
They are the same thing. Supination and underpronation both describe a foot that rolls outward instead of making a normal inward roll with each step.
An EOS scan captures your whole skeleton from head to foot in one standing image. It shows how all your joints line up under your own body weight. A standard X-ray usually covers one area and is often taken lying down, so it cannot show the same alignment information.
Yes. EOS uses about 90% less radiation than a standard X-ray, around ten times less. It is a well-established imaging system used in hospitals and specialist clinics.
No. You can refer yourself. The process starts with a free video consultation to make sure a standing scan is suitable for your situation.
The price for patients travelling from abroad is confirmed during the free video consultation, and you can find more answers on the ScanAlign FAQs page.
Orthotics support the foot while you wear them, but they do not usually change the underlying bone structure permanently. They work best as part of a wider plan that may include strengthening exercises and suitable footwear. Accurate imaging helps make sure the orthotic prescription matches your actual alignment.
See how your whole body lines up, standing
A free video consultation helps you find out if a standing EOS scan is right for your foot or alignment concern, before you plan a trip to London. No referral needed.
Book a free video consultationSources
- Neal BS, Griffiths IB, Dowling GJ, et al. Foot posture as a risk factor for lower limb overuse injury: a systematic review and meta-analysis. Journal of Foot and Ankle Research. 2014;7:55.
- Illés T, Somoskeöy S. The EOS imaging system and its uses in daily orthopaedic practice. International Orthopaedics. 2012;36(7):1405-1411.
- NHS. Flat feet. nhs.uk. Available at: https://www.nhs.uk/conditions/flat-feet/
Written by Abbas Dhami (Specialist Diagnostic Radiographer)
This page is general information and not a diagnosis.
ScanAlign is the trading name of CoreMed Solutions Ltd and operates under The Harley Street Hospital's CQC licence.