WHAT DOES PRONATION AND SUPINATION MEAN?
Pronation and supination are motions. A normal foot is supposed to pronate when the heel hits the ground. This allows the foot to adapt to uneven surfaces. Midway between when your heel hits the ground and the foot lifts off the ground, the foot is supposed to supinate. This allows the foot to become more rigid so you can propel off the foot. When your foot pronates it becomes flatter, and when it supinates the arch becomes higher.
All this motion takes place at the Subtalar joint. There are actually two joints in the ankle area. The ankle joint itself can only move up and down. It is the Subtalar joint that allows the foot to move side to side. This is the pivot between the foot and the leg.
A problem occurs when the foot does not pronate and supinate at the correct time. A foot that remains pronated is a very flat foot. Heel, arch and even knee pain can be due to excess pronation. A foot that remains supinated has a very high arch. It is less stable than a flatfoot. It is prone to heel and arch pain also but it is common to have pain in the ball of the foot, to develop hammartoes, and even low back pain can originate from a high arch foot.
Note: While it is possible for knee hip and back pain to originate from the foot, it is important to have them checked out by an Orthopedic specialist.