A lot of this is hard to tell unless you’re a specialist or REALLY know your body. BUT if you go to stores that specialize in running shoes, they will tell you this stuff for you. Most of the consultations are free….so don’t pay for that shit. Most are commitment free…so don’t do it if they’re like “it’s free if you buy our $300 running shoes.” Also, I assume a podiatrist could tell you. I got mine at Fit2Run at the Florida Mall.