Start in a side plank on your left side, holding a dumbbell in your right hand with your right arm parallel to the floor.
Exhale and pull your abs toward your spine to stabilize your torso as your raise your right arm to the ceiling. Do not let your hand travel behind your shoulder. Lower the weight back to the starting position to complete one rep. Squeeze your inner thighs together for added stability.
If you feel wobbly in this position, split your legs, bringing your right foot forward.