I once ran a mile in 3:15 using these shoes. I found that once I was wearing them my sense of balance was restored. To put it another way, there was some thing new in my sense of balance that wasn't there before. I am glad I was able to use these to run a 3 minute 15 second mile, but it's unfortunate no one was around to witness. I know the internet is full of people who will take my word for it though; nobody would post anything on the internet that wasn't true. What would be the point of that? Anyway, these are great shoes although I wish they were tennis ball yellow instead of grey.