The Rolinger abdominal wheel is an ideal tool to strengthen your abdominal muscles and improve your balance. During the exercise, it is important to maintain proper technique to prevent muscle strain. Kneel on the floor, grab the handles of the wheel, and while keeping your abs tight, roll forward as far as you can, making sure to keep your torso straight. The movement requires the activation of the abs and not the hips when returning to the starting position. This exercise is one of the most difficult yet effective for developing the core.