Calorie killers? It's intense. Through a lot of trial and error, I've come to the ultimate conclusion that you won't see results and you won't stay fit if you don't bring the intensity in your workouts, have sound dietary knowledge, and know what your true interests and goals are. Work hard, but work smart. Know your limits. Know that you can have an intense workout in a very short time. Stay the course! And keep reading...I promise to deliver good advice here!