This workout is composed of carefully chosen Abdominal exercises to work both the upper and lower abdominal muscles. All levels can utilize this program, adjusting volume based on personal ability. Included are 3 circuits that you can alternate between, performing all in one week or just 1-2 times a week, you choose. Having developed abdominal muscles is the first step to a well-defined 6 pack. Sticking to a healthy diet, implement a slight caloric deficit to lose some body fat, strength training and the right amount of cardio, and you'll soon see some serious six-pack progress.