I was flat footed for many years how ever I got a structure support trainer at the start of the year and I now have a arch in my foot but now the trainers cause my feet agony! I did a ten mile run yesterday which I would easily do in 1 hour 20 but I walked for a solid mile or two because it hurt so bad! I can barely walk today! ( Its like a burning feeling in the middle of my arch and about 1/2 a inch below my little toe on the outside) Is it safe now to go from structure support trainers which cost easily over ??120. But would it seem safe to go and buy a normal pair of running trainers? Thank you for the help!