Overpronation is a term that is widely misused and abused in sports medicine. A foot that overpronates is supposed to roll inwards at the ankle joint and this is supposed to predispose the foot and lower limb to a whole range of running injuries. Running shoes are often prescribed based on the amount of overpronation and there is a whole class of running shoes designed for the overpronator. Unfortunately the evidence falls short of the reality. There is very little evidence that overpronation even causes any problems and the evidence is that running shoes do not control motion in the overpronating foot. A lot more work is needed to find a way through the evidence versus the hyperbole. There are so many myths surrounding this concept, that every runner should have a read of this.