No surprise here--the six-pack is a hot topic. It's a phrase searched for more than 1.2 million times a month on Google alone. But there's more to your midsection than its six sexy segments. In fact, that washboard is actually made of one muscle, the rectus abdominis, which gets its "separations" from dense connective tissue called fascia. The muscles on the sides of your torso are also considered part of the abdominals: Your external and internal obliques help you bend your torso from side to side and rotate your upper body left and right. If all of this is news to you, read on for 11 more essential facts about your abs that you probably don't know.
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