Overpronation is a word that causes lots of angst among podiatric doctors and running shoe retailers mainly because it brings about a whole lot of misunderstandings and argument. Pronation is really a movement of the foot where the ankle rolls inwards and the arch of the foot collapses. This is a normal healthy movement which is necessary for normal foot biomechanics and impact moderation. Overpronation is meant to be the phrase useful to explain if you have an excessive amount of this normal pronation. The first part in the controversy is precisely what is normal what is actually abnormal and exactly where may be the threshold of the division between normal pronation and overpronation. You can find formidable opinions on every side of this debate and there doesn't appear to be any solution in the discussion in the near future.
The reason the subject creates a huge amount of debate is that overpronation has been thought to be a key aspect in overuse injuries in runners. Podiatrists commonly use foot supports to treat the problem and running shoe manufacturers make running shoes to help athletes who have the condition. This suggests there is lots of vested interest in it. The problem arises is that the scientific evidence shows that, yes, overpronation generally is a risk factor for a running injury, but it is not really a big risk factor. It can be even more complicated by a lot of athletes who have fairly severe overpronation and never develop any issues and do not need foot orthoses or running shoes with the motion control design features. That will not help fix the controversy nor help clinicians make judgements re foot supports and for running shoe retailers on advice as to what ought to be the right running shoe. It really comes down to clinicians and running shoe retailer’s individual experience and expertise and making choices in the framework of what exactly is ideal for the individual runner.