Lie on your back with your knees bent and your feet between hip- and shoulder-width apart. Your heels should be directly below your knees with your thighs parallel to one another and toes pointing forward. Hold a dumbbell in each hand.
As you inhale, push your heels into the floor. On your exhale, brace your core and lift your hips off the floor and come into a glute bridge hold.
Hold the bridge and, as you exhale, straighten your arms so the dumbbells are above your shoulders, with your palms facing each other. If this is too difficult, just hold one dumbbell with both hands.
Keep holding the glute bridge, and as you inhale, lower the dumbbells toward your forehead until your elbows bend to 90 degrees. This counts as one rep.