For these with flat feet, the arch of the foot doesn't provide enough effective spring.
This leads to flat-footed people using move energy than those with normal feet,
and tiring easily after walking for a short time.
When there is insufficient muscular training,
flat foot develops and the feet become unstable.
This leads to an imbalance between the right and left sides of the body.
As a result, the pelvis and shoulders bend on slope
bringing on stiff shoulders, dizziness, internal disorders and so on.
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