Begin by lying on your back with one knee bent, foot flat on the floor, and the other leg extended. Hold a dumbbell on your hips with both hands. Engage your core, press through the heel of your grounded foot, and lift your hips until your body forms a straight line from shoulders to extended knee. Squeeze your glutes at the top, pause briefly, then lower with control. Keep your hips level, your core engaged, and avoid arching your back or swinging the extended leg.