thats interesting - suggests that the pounding of regular running can be reversed. Do your high arches give any problems with shoe fitting?
Yeah, potentially. Maybe depends on the individual and how long they've been running for? Don't really know much about it to be honest.
When I was younger it was an issue, especially with things like school shoes. It hasn't been a problem since school days, but maybe that's a combination due to my lack of buying shoes that aren't for running, and it being a bit lower. I don't think I had much problem by the end of school, although my memory's not the best.
Possibly another factor is the lack of time I've spent in shoes recently and I wouldn't be overly surprised if yoga makes a difference. Hard to tell exactly what causes what.