I'm 240lbs and just ran 10km with them and did a little running a few weeks ago. They work as advertised, definitely absorb a lot and don't cause sore muscles the next day. I will buy them again. The only downside is that the upper edge of the shoe is already a bit worn from rubbing with my foot. Maybe it's my oddly large feet, but either way I'd think the top edge of the shoe (where you enter with your foot wrapping around your ankle) is more durable.