Dumbbell one arm lateral raise

Stand with your feet shoulder-width apart, holding a dumbbell in one hand with your palm facing your body. Keep your back straight and your core engaged throughout the exercise. Raise the dumbbell to the side, keeping your arm straight and your palm facing down. Continue lifting until your arm is parallel to the ground. Pause for a moment at the top, then slowly lower the dumbbell back to the starting position. Repeat for the desired number of repetitions, then switch to the other arm.