Performing the: A Step-by-Step Tutorial Dumbbell One Arm French Press on Exercise Ball
Extend your arm holding the dumbbell straight up towards the ceiling, keeping your elbow close to your head.
Slowly bend your elbow, lowering the dumbbell behind your head until your arm is at about a 90-degree angle, ensuring you keep the upper part of your arm stationary.
Push your arm back up to the initial position, using your triceps to lift the dumbbell.
Repeat the exercise for the desired number of repetitions before switching to the other arm.