Begin in a high plank, your hands under your shoulders and heels over your toes. Pull your core towards your spine.
Take a breath in, and as you exhale, slowly bend your elbows, lowering your entire body to the floor. Keep your elbows close to your ribs as you bend; your elbows should point straight behind you. Go as slowly as you can as you lower down.
Lower your body until your chest and thighs rest on the floor. Do your best not to collapse, making sure your entire body touches the floor at the same time.
Squeeze your shoulder blades together and lift your palms off the floor.
Press your palms into the floor and straighten your elbows to pushing yourself back into the starting position. This counts as one rep.