Most runners I know wear running shoes nearly the whole time. They run in their new shoes, then switch them over to casual use as the cushioning starts to go.

Most runners I know wear running shoes nearly the whole time. They run in their new shoes, then switch them over to casual use as the cushioning starts to go. And if you're a really keen runner, you'll have different shoes for each type of training (track, tempo, long and slow) and racing (track, XC, trail, mid distance, half to full marathon). So you end up with a constant flow of "worn but not worn out" shoes. Which you wear when not running...