The first thing you need to know is that to get lean and fit requires you to train your WHOLE body — you have to do more than just ab workouts! Getting the results you want with defined abs takes disciplined training and a healthy eating plan.That said, doing extra ab exercises in addition to a full-body workout plan, can help build muscle in those areas you want to pay more attention to. Core strength is crucial for your overall fitness and helps to improve balance and stability. ~ Berceste