I have been a recreational runner, average 4-5 miles/day, 6 days a week, for 36 years. I have gradually moved to "natural" running shoes over the past year (Vibram 5 Fingers, NB Minimus 10 Trail) with no problems. I bought these Minimus 10 Road shoes from another supplier to move fully away from regular thick soled shoes. These shoes are, however, the worst I have ever had - absolutely no cushion or arch support. There is a ridiculous, rock-hard lining around the inside, inner edge that is brutal on your feet. These are the worst, most painful running shoes that I have ever had. I am giving them to Goodwill after just one run - a total waste of money.