For a moment, the pace slowed—or at least that’s how it seemed to Kaitlin Gregg Goodman. Years ago, when the former pro distance runner ran the 10,000 meters at the Stanford Invitational, she sensed ...

We’re going to go out on a limb here and guess that if given the choice between an outdoor run and a treadmill session, most athletes would pick option A, no hesitation. And while there’s a lot of ...