At 6'4" 270 lbs. it's hard to find a shoe that doesn't hurt your feet, knees, and/or back when running any distance at all. Don't let my size fool you, I'm an avid runner and love a 5k as much as the next person. I decided to give these a try after trying two other brands with no luck. So far these are great. I only have a couple easy runs on them now but I've got a good feeling about them.