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If you want pancake-flat, carved-up lower abs and a razor-sharp V-cut, consider The Lower Abs Trifecta your little secret weapon. Comprised of 3 different ab exercises back-to-back, it'll absolutely demolish your lower abs and leave you sore for days. That's exactly what we want -- hyperaccelerated growth.
Reverse Press Up - Trainers Reveal: The Best Abs Exercises of All Time - Shape Magazine - Page 14
6 core targeting exercises.