Lie facedown with your arms bent, elbows by your sides, and hands under your shoulders. Tuck your toes under, squeeze your legs together, and keep your knees on the ground.
Take a deep breath in, and as you exhale, pull your abs away from the floor. This is your starting position.
On your next exhale, lift your chest, hands, and head off the floor until you feel your back muscles engage. Keep your chin down and your head in line with your spine.
Squeeze your shoulder blades together and lift your elbows and hands up toward the ceiling. Keep squeezing your legs together. Most importantly, keep your abs engaged and do not overarch your back.