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I'm fairly flat footed and (rather unsurprisingly) during gait analysis at my local Sweatshop i discovered that I overpronate quite a lot when running.
During long runs (9 miles or more) I start to get blisters in the fallen arches of my feet, and they're not little blisters - I'm talking about 1-2 inches long, all along the 'arch', and really full of goo. As you can imagine, they're a bit of a nuisance. I went along to Sweatshop to get fitted with a new pair of shoes and they recommended a pair of Asics Kayanos, which I broke in slowly and have been running in for 4 months, and voila - the blisters have stopped!
However since running in these I have had terrible problems with knee pain, which began when I started running solely in the Kayanos and miraculously eased when I went back to my old trainers... I've decided not to wear them anymore, obviously, but am dreading building up my long runs again because of the inevitable blisters in the arches of my feet!
I had previously been running in Nike Lunarglides and Lunarelites with no aches or pains, other than the blisters.
Has anyone had any similar problems with blisters? Can anyone recommend a shoe with decent arch support that can stop the blisters, but not as severely structured as the Asics Kayano?
I have been running regularly for nearly 2 years, mostly half marathons, averaging 15-25 miles a week.