While most runners set a goal to get faster, an even more pointed (and beneficial) objective is to improve your VO2 max. Not only does this metric—a measure of how much oxygen you can take in and use ...

The kids lost it for the Danes. Like, jump-out-of-your-seat incredulity, involuntary burbles of whoas muffled by hands over mouths. These kids (nine-year-olds to twentysomethings) were watching a ...