Intensity vs. "Cardio"

For decades now, doctors and "fitness experts" have prescribed long, boring, low-intensity "cardio" workouts (running, swimming, cycling, elliptical machines, etc.) to people who need to lose fat as the most effective method of doing so.  I recently wrote about research that demonstrates that excessive endurance training is not only less effective than high-intensity conditioning at burning fat,  but can even be harmful to the heart.

Pepperdine University is studying the metabolic effects of CrossFit on the body, which no one has ever done before.  If the CrossFit Games weren't enough to convince you, now there is scientific evidence for the effectiveness of such training.  The following videos explain what goes on inside the body when we train at high intensity, and why that kind of training is more effective than "cardio" at burning fat.  If you don't have time to watch the whole thing, skip to 7:00 on the second video.