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Working off the the highly successful 7 Minute High Intensity Workoutapp ... the 7 Minute Power Plank Workout will work your core to its maximum in just7 minutes. Six hard working plank exercises with a short burst of rest in betweenwill have you huffing and puffing and sweating your way to a stronger core. If youdo this Plank work out and don't feel the burn you are doing it wrong! With anextremely easy to use interface you will be on your way to developing strong abs anda strong core in no time!