Overpronation has become the most misused as well as confusing lingo in running and health professional groups, specially when it involves the prescription of running shoes. The main conventional model of the manufacture of different running shoes depend on the thought of the normal or neutral posture of the feet. Pronation occurs when the foot moves inwards at the ankle joint and the arch collapses. Supination is when the feet tilts laterally at the ankle and the arch height increases. These are typically normal healthy motions that are required for normal biomechanics of the foot. It is how the foot adapts to unequal surfaces and absorbs shock. There is nothing wrong with the movements of pronation or supination.
The term Overpronation is used to describe when there is excessive pronation. The reason that this is an issue is that overpronation is assumed to be a risk factor for numerous different overuse injuries. Because of this, running shoes have got design features in them that are intended to help control this overpronation. These design features include medial heel posts, dual density midsoles and also rigid heel counters. These shoes are supposed to be prescribed for those who overpronate. Runners who don't overpronate should really use cushioned neutral shoes.
The trouble with this theory is that the phrase is misunderstood quite a lot. There is no consensus regarding the cut-off stage between normal pronation and overpronation. There's also minimal evidence connecting overpronation to running injury and if there is any, it's suggesting that it really is only a tiny risk factor. Lots of runners overpronate significantly and never have problems. Equally, there are numerous runners that do not overpronate that have a lot of problems. Because of this dilemma, there's been a recent improvement in using the term and the comprehension of overpronation in relationship to running injury and the use of running shoes.