[inSenCite]

Yeah mostly cost related as others have suggested, I also use more cushioned shoes for training to help reduce fatigue for the back-to-back weeks of long runs.

I thought the same thing about gait but gave it a shot anyway. Didn't throw me off all that much, and I still enjoyed running in the firmer fly's. I did do a few trial short runs before the long run just so I was not going in cold.

To give an idea of shoe wear. I'll easily run through 1 pair in a year if I'm training for a marathon (just to run it). If I'm training to beat PRs then I'll go through almost 2.