Probably my mistake for just going to a regular sports outlet and buying what I thought looked the part. Never looked into the pronation of trainers before. Just used to use a couple of pairs old New Balance in the past, that never cost more then £35 a pair. These served me well for my first couple of Marathons. But thought I would treat myself to some new ones, so opted for the models listed above. One of the pairs is for using in the gym, the other is for general running. I hope I bought well, because they were not cheap.