The running shoe is not suitable for hard ground in the long run. For this was the also not designed. Also, there is a problem with people who are overweight due to the attenuation of the joints. The Rubber Sole is made of a plastic that comes into slip even at low humidity. The shoe is very suitable in the winter with snow and ice, with spikes. - But only then! - I use it therefore just for this purpose. Otherwise I need him year two pairs of running shoes from Asics running for my sport.