Tummy, stomach, washboard, six pack, beer belly…whatever the preferred lingo, defined abs are most certainly desired. Believe it or not, the term “six pack” is searched for more than 1.2 million times a month on Google! We’ve all heard of “washboard stomach,” but do we know what it really means? The rectus abdominis a.ka. “six pack” muscles run vertically on each side of the abdomen. The muscles on the sides of your torso are also part of your abdominals, whereas your external and internal obliques help you bend your torso from side to side, and from left and right.

Source: fatorfit.org