Stand to the left of a ring or square on the floor (or just imagine one drawn on the ground). Drawing your knees up to your chest with each step (this is where those lower abs come into play), step your right foot inside the ring, then your left. Step your right foot out, then left. Repeat in the opposite direction as fast as possible for 30 seconds.
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Use this smart circuit to uncover your sculpted stomach faster
sculpted sweaty abs
The Best Cardio for Your Abs