This time last year I went to accelerate in Sheffield, had gait analysis done, feet looked at and was told I pronate and had flat feet. Instead of suggesting trainers with support they advised the opposite - completely no support. And so I ended up with a pair of Ghosts. One year and several 10kms later and my calf is in pain after every run. My physio says that I should have been wearing trainers with support as I have flat feet and probate. Is there any good evidence for who is right?