Jul 30, 2012 - Get into an elbow plank position. Raise your right arm in front of you so it's parallel to the ground and lift your left leg at least two inches. "Fly" your arm and leg out, moving them away from your head and body, then reverse back to the starting position. Drop down, then repeat with the opposite arm and leg. That's one rep. Do 15. Quick Tip: Make it easier by lifting your legs and shoulders only slightly off the ground.