Todd McCullough (TMAC) is the founder of TMAC FITNESS. TMAC FITNESS’s mission is to assist in creating a culture that is conscious of the body and the world in which we live. Check out his mindbodygreen class, Total Body Workout: How to Strengthen Your Core, Tone Your Arms & Improve Your Flexibility.

Abs are good. Abs are very good.

Why? Well, first of all, they look pretty good. But they're also key in protecting your back, your internal organs, and improving your confidence. So if getting a strong, solid core is on your to-do list, check out my signature ab workout below.