Because you have to balance the dumbbells individually it also contributes to strong core development.
Dumbbell press. You can do dumbbell presses on a standard flat. The flat dumbbell chest press is the king of exercises for developing your pec muscles overall. When performing the exercise on a flat surface 90 degrees it recruits most of the muscle fibers in your pectoralis major. The dumbbell bench press is like the younger brother of the barbell bench press.
For more info on crossfits trainer courses. Here we talk steps and tips for doing this exercise using a bench or while. Generally lifters will have an easier time setting up and controlling two relatively lighter weights. Most of these fibers are located in the medial.