I first tried the Norwegian 4x4 workout a year ago, and since then, it has become a staple of my fitness routine. I don't do it every week (some folks do), but it's a workout I keep returning to ...

You’ve been hitting the treadmill religiously for months, logging hour after hour of steady-state cardio, but the scale isn’t budging. In fact, you might even be gaining weight. As a personal trainer ...