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Plank Workout For Flat Abs

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Plank Workout For Flat Abs

... Jenny Sugar/Popsugar:

Plank is one of the most effective exercises to target your core and upper body. Here's a 20-minute circuit workout combining six different dynamic variations of the basic plank — remember to stretch your back and arms for a couple of minutes after you've completed all those planks. 

 

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Personal Training Strength Training gym