The joys of running — the scenery, the endorphins, the awesome playlists — sometimes come with uncomfortable byproducts. If you've ever experienced black toenails or blisters, run coach Alysha Flynn ...

Add Yahoo as a preferred source to see more of our stories on Google. If you don't know about the "heel lock" on running shoes, don't worry, you're not alone. This latest video struck plenty of users ...