Overpronation is a expression that triggers plenty of angst among podiatrists and running shoe shops because it brings about a huge amount of confusion and controversy. Pronation is actually a movement of the foot where the ankle rolls inwards and the mid-foot (arch) of the foot collapses. This is the normal healthy movement that is important for normal foot biomechanics and impact moderation. Overpronation is said to be the phrase helpful to identify should there be too much of this normal pronation. The first aspect of the discussion is exactly what is normal what is actually abnormal and just where will be the threshold of the split between normal pronation and overpronation. You can find formidable views on every side of this controversy and there doesn't seem to be any resolution in the debate on the horizon.
The reason why the subject creates a great deal of debate is that overpronation continues to be thought to be a key aspect in overuse injuries in runners. Podiatric doctors commonly use foot supports to manage the condition and running shoe producers design running shoes to help athletes which have the condition. This implies there is lots of vested interest in this. The issue arises is that the research evidence demonstrates that, yes, overpronation is often a risk factor for a running injury, however it is not a large risk factor. It can be further complicated by a lot of athletes that have pretty severe overpronation and never develop any problems and don't need foot orthoses or running shoes with the motion control design characteristics. That doesn't help solve the controversy nor help clinicians make judgements re foot orthotics and for running shoe sellers on advice as to what needs to be the proper running shoe. It really comes down to clinicians and running shoe retailer’s individual expertise and experience and making decisions in the framework of precisely what is suitable for the individual athlete.