7 Plank Variations to Whittle Your Waist

7 PLANK VARIATIONS TO WHITTLE YOUR WAIST Planks work all muscle groups in your core (plus help strengthen your entire body) and you can pretty much do them ANYWHERE (gym, home, hotel, airport, restaurant, etc).

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7 Plank Variations for Strong Core and Abs

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7 Plank Variations for Strong Core and Abs