Injuries from Walking?

[Crouton]

Hey everyone.
I used to walk a lot. I'm talking one or two hours a day at least, maybe more. But recently I've been having a lot of trouble with pain in my feet and legs. I went to a podiatrist who said I've been walking too much in bad shoes and that's what caused the damage. So I went out and bought some new sports shoes, ones that are designed for walking in particular. They are a lot more comfortable but I'm still having a lot of pain when I go for walks in my feet.
Does anyone know how long it will be now that I have bought the new shoes to not have pain when I walk?