My daughter had recently started c25k . She has just completed wk2r2 but is having pain in the arch of her foot when running . She has been wearing old trainers & on my reccomendation went & got gait checked & new trainers from sweatshop . She slightly over pronates & has got stability running shoes ( nike ) after running in them she still has the pain & she says she's exchanging them for neutral runners & getting the insoles what they fit you up with in the store , as the assistant told her this is also a option . Has anyone tried this & also could the pain be plantear fascitis ( hope I've spelt it correctly ) .