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Barbarian Power Gym Dewas on Twitter: "The plank is an isometric core strength exercise that involves maintaining a position similar to a push-up for the maximum possible time. . . . . . #
💥Power Plank -vs- Plank Jack💥 . Both of these exercises are powerful and effective, BUT often mistaken for one another! So how, exactly, are they... | By Burn Boot Camp - Manchester, MO | Facebook
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