In tabletop position, raise right arm until parallel with ear, and simultaneously raise left leg until parallel with floor. Return to start and repeat with left arm and right leg. Engage your core to stabilize yourself and to avoid falling to one side. Do three or four sets of 10 to 15 reps. Do this move every day.
There are plenty of non-aesthetic reasons to boost core strength. “Some of the strongest people in the world don’t have six-packs, and they can lift a lot, or hit home runs, or perform tremendous feats of athleticism,” says Klika. Here’s what you’ll gain when you think bigger and train smarter: