Reviewed by JP Michelsen, CPT, B.A. Kinesiology
Arnold Dumbbell Press is a compound movement that primarily targets the shoulders. The difference between the Arnold Press and a standard Shoulder Press is that you bring the dumbbells in front of you at the bottom of the movement rather than stopping when they reach your shoulders. Bringing the dumbbells in front of you can be more a comfortable movement as well as improve muscle activation.
The Arnold press involves rotating your palms from facing your body to facing forward as you press overhead, targeting the front deltoids and upper chest. The dumbbell press is a straightforward press with palms facing forward throughout, primarily targeting the middle deltoids.
The Arnold press involves rotating your wrists as you press the weights overhead, engaging more muscle groups and improving shoulder mobility. The dumbbell shoulder press is a simpler movement with no wrist rotation, focusing primarily on building shoulder strength.
Leaning back can help you lift a bit more weight, or finish off a difficult set. However, it also reduces the effectiveness of the exercise, and increases the risk of injury. Keep your back straight, core engaged, and gaze forward to help prevent this.
Performing this exercise while seated adds stability to the movement. You don’t need to focus on keeping your balance, or stabilizing your body. This allows you to focus more on exertion, which is great, but make sure you’re including some standing variations as well. This will help highlight and address some instability you may have with this movement.
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