It’d be worth seeing a podiatrist if you can, Jonathan. My arches basically fell from being pounded into the ground with an impact of something like 3 to 6 times my body weight, 750 times per mile, mile after mile after mile. But my arches were always low, and a bit more flexible than they ought to have been. You might want to get things checked out, but you sound unlikely to suffer my achy-footed fate.