Recommendations: 2-3 Sets, 8-12 Reps
Sit on a chair with your feet shoulder-width apart. Grasp a water bottle and hold it with both hands. Raise the dumbbell straight above your head. This is your starting position. Lower the bottle behind your head, while keeping your upper arms stationary close to your head. Inhale during this movement. Push the bottle, in an arc with your triceps, back to the starting position, keeping your upper arms stationary and close to your head. Exhale during this movement. Repeat for the recommended number of repetitions.