Unfortunately it is something that you just have to manage the best way you can. My eldest still gets really sore and achy feet, especially after he plays footy and all we can do is manage it by regular chiro visits to check his spine alignment and replace his shoes before they get too worn out and less supportive. Same with DD - as soon as her shoes get worn we replace them and we don't have as many problems. It's tough though, especially when they are so young, because you know it may be a problem they have well into adulthood.