I just learned that one of my favorite ways to pass the time in a hotel gym has been given a catchy name and a celebrity endorsement. It’s the 15-15-15 workout, and it will give you a good 45-minute ...

The 15-15-15 workout goes by so quickly, you more or less break a sweat and then you're finished. At least that's what it feels like. This is the workout for anyone who'd rather be doing anything else ...