Place feet next to each other (if beginner, stay on knees) and hold either side of a Reebok Core Board.
Keep your wrist line straight with arm. Press up into a push-up position.
Keep your back flat, in a straight line from head to heels.
Tilt your hips and contract your belly tighly to prevent your rear end from sticking up in the air, keeping good quality posture.
Hold 20-60". Repeat.