alasta:
Worn shoes also tend to lead to injury. Earlier this year I got a painful knee injury with shoes that had done nearly 1500km, and it was surprising how quickly the pain eased with new shoes. I won't go beyond 1000km in future, but some experts seem to recommend even 800km as a limit.
Yeah I go through 1 to 2 sets of shoes a year and I average 1600-2000km of road running. My trail shoes go till they wear out.