Thirteen Muscle Groups

There are three Fridays that fall on the 13th of the month this year, which only happens only once every 11 years or so. For more superstitious folks, that’s not great news, as Friday the 13th is often associated with bad luck and horror flicks. Today, however, Friday the 13th has a special meaning, as it is the day before Valentine’s Day. And here at Koko, we’re all about more love…less handles.


Here’s another reason why we “embrace” (pun intended) the number 13: There are 13 major muscle groups in the human body, and your total-body workouts at Koko FitClub work every one of them.

How many of the major muscle groups can you name?

Give up?

Don’t worry. I’ve created a little cheat sheet for you below. Click on it, print it out, and refer to it as you work through your Koko Smartraining strength workouts with your FitCoach. You’ll be more engaged throughout your workout when you know more about the muscles you’re working, and it will help you to better understand the efficiency and balance of a Koko full-body workout.

Over the next few weeks, I’ll be focusing on a new muscle group each week, and sharing some form tips and information to help you get to know your muscles a bit better.

Happy reading, and Happy Valentine’s Day!

– Michael Wood, CSCS, Chief Fitness Officer, Koko FitClub



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About Michael Wood, Chief Fitness Officer

Michael Wood, CSCS, is Chief Fitness Officer at Koko FitClub, driving the development of integrated strength and cardio training and nutrition programs for Koko members nationwide. A nationally acclaimed fitness expert, Michael has conducted research as a Senior Exercise Physiologist at the Nutrition, Exercise Physiology and Sarcopenia Laboratory at the Research Center on Aging at Tufts University, and has lectured at Boston University and the University of Connecticut. He has been named Boston Magazine’s “Best of Boston” Personal Trainer, and made the Men’s Journal “Dream Team” list of the nine best trainers in the U.S. Michael and his family live in North Attleboro, MA.

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