Here is another very critical point to realize when you reduce you carbohydrate intake: you will be losing a lot of water weight. Remember, carbs always promote water retention. As such, when you cut out your carb intake, you will find you do not retain water any longer and lose weight to show your more defined set of muscles, especially when you have a rigorous Ab Workout combined with it. Too much water in a physique will make it hard to appear lean and defined. When you lose excess water weight, you will look a lot more ripped and defined with your abs.