High-tech running shoes have changed the sport forever, but using them the wrong way can do more harm than good.

The first pairs of the famous self-lacing MAG shoes from "Back to the Future II" will be made available this month to the public, but you won't be able to buy them. You'll have to win them. Nike ...

You can start with as little as 20 to 30 seconds of running at a time followed by 1 to 3 minutes of walking for 15 to 20 ...