Health

Overpronation, Supination and Flatfoot

over pronate example

If you have pain in your knees and ankles that immobilizes you or stop you from jogging, consider looking at whether your feet is balanced normally.

Supination (under pronation) is when the weight is shifted outwards towards the outer edge of the feet, resulting in more wear on the outer edge of the sole.

Over pronation is when the weight is shifted inwards to the inner edge of the feet, resulting in more wear on the outer edge of the sole.

This article from Healthline and diagram below explains the difference of these two. According to Healthline:

  • If you supinate, it can cause excess strain on your ankles. It may lead to shin splints, calluses, or bunions on the outer side of your foot, and pain in your heels and balls of your feet.
  • If you overpronate, you may develop pain in your:
    • arch
    • heel
    • ankle
    • shin
    • knee
    • hip
    • back
Foot shapes of over pronator and supinator
Foot shapes of over pronator and supinator

Flatfoot is most likely to have overpronation, but it depends on the severity of the flatfoot. Below is a useful diagram from footlevelers showing difference between supination and overpronation with the foot imprint.

Severity Diagram © 2014 Dennis Homack, DC, MS, CCSP
Severity Diagram © 2014 Dennis Homack, DC, MS, CCSP

It is interesting to note that we can check the wear of our shoes to determine if we are normal, which is “B”. In most cases (except E), the heel wear cannot be used as the determinant, but the wear on the front sole.

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