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TheActiveTimes.com: 4 Worthless Exercises You Probably Do

Overrated: Crunches

This gym-class standard needs an update: According to research from San Diego State University, the traditional crunch is the least effective strengthener for both the rectus abdominus (6-pack muscles) and the obliques (waist muscles). What’s more, because sit-ups require more strength from front ab muscles than obliques, this move can create a strength imbalance in the core—setting you up for back problems.

(Credit: Shutterstock)
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The opinions expressed are solely those of the author and do not necessarily reflect the views of Comcast.

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