The true 'flat foot' is very rare. In fact, less than 5% of the population have flat feet with no arch present whatsoever.
The majority of us have a normal arch (or somewhat low arch) and only 5-10% have a high arch!
However, most people with a 'normal- to-low' arch actually suffer from 'over-pronation' during walking, running and standing. This means the foot may appear normal and a clear arch is present under the foot, especially when sitting down...
This siutation changes with weight bearing; with every step we take the arches collapse and the ankles roll inwards. This is called over-pronation. Pronation itself is not wrong as we need to pronate and supinate as part of our gait. Pronation (rolling in) acts as a shock absorbing process and supination (rolling out) helps to propel our feet forward.
Over-pronation occurs when we pronate too deep and for too long, not giving the foot a chance to 'recover' and supinate.
Therefore, over-pronation hampers our natural walking pattern, causing an imbalance and leading to wear and tear in other parts of the body, with every step we take!
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