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Make Your Abs Workout 5X Harder

Make Your Abs Workout 5X Harder

Men's Health - By The Editors of Men's Health

This trick is quick, simple, and highly effective Planks are tough, but you probably wouldn’t call them nightmarish. Until now. This version of the exercise comes from Dean Somerset, C.S.C.S., an exercise physiologist in Edmonton, Alberta Canada. In just 10 seconds, your abs will feel as if they’re …

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