Plank With Triceps Kickback Start in a plank position holding a weight in each hand. Bend your left elbow and pull it up so it's in line with your shoulder. Pull your navel toward your spine to engage your abs, which will help you stay balanced. Exhale as you do a triceps kickback by extending your left hand behind you. Inhale to bend your elbow. This counts as one rep. Perform exercise on both sides of the body. Image Source: POPSUGAR Studios