One of the main points that I am trying to make is not to spend all your time focusing
on what's in your workout but to spend much more time focusing on adding intensity to your workout. That's what is going to bring you some real results. The goal of interval training is to burn calories and build muscle; this is what makes it so effective, far more effective than normal cardio. In fact if you add the intensity needed to your interval training moves you can burn more calories and be done your workout in half the time. Its really a cool training technique.