"Well for me these didn't work...and within about 10min. I have flat feet & mild bunions and I think arthritis in the ball of my foot. I walked around the house with these and jogged in place a bit and within minutes the bone over my arch (1st metatarsal I think) felt strained. I felt also like at lease in one foot it was overcorrecting my step so I felt like i was walking on the outside of my foot. I think i like the Sauconys that are not for flat feet and just use an insert!"