"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." THE HARDEST THING about running during a lab test: I become a mouth breather. I’m hooked up to a computer ...

U.S. men’s marathoning has hit a new elite level. And Runner’s World readers like you are trying to figure out why. Our great in-depth look dives into so many fascinating factors to consider when ...

For most of their existence, super shoes have been sort of fungible. Sure, some have been better than others. But within their primary elements—a thick slab of next-gen midsole foam, a carbon-fiber ...