We all think that crunches are going to give us that perfect washboard abs, right? But the fact is that crunches alone can’t do anything to melt away layers of fat from your abs. The first step to a strong core is getting rid of all the belly flab. Twist exercises do exactly that. They target the fat and at the same time work on your core muscles. Twist exercises not only work on your upper and lower abdominals, but also works on the oblique muscles.