Position your hands shoulder-width apart on the edge of the mattress.
Slide your butt off the bed with your legs extended out in front of you.
Straighten your arms, keeping a little bend in your elbows to maintain tension on your triceps and off your elbow joints.
Slowly bend your elbows to lower your tush toward the floor until your elbows are each at about a 90-degree angle. Be sure to keep your back close to the bed.
Straighten your elbows, returning to the starting position. This completes one rep.