Here's a great core workout that hits all areas of the core! Add this workout into your program, combine it with a calorie deficit and you should see some definition in no time. This workout is composed of seven abdominal exercises carefully chosen to work both the upper and lower ab muscles. Hit this workout hard three times a week, stick to a healthy diet that goes easy on the calories, do some lifting and the right amount of cardio, and you'll soon see some serious six-pack progress.