Which exercise is NOT typically used to strengthen the pectoralis major?

The single arm French press is primarily an exercise focused on the triceps brachii rather than the pectoralis major. This exercise involves extending the arm overhead and then lowering the weight, which targets the muscles in the back of the upper arm rather than the chest.

In contrast, the bench press, push-ups, and dumbbell flys are all classic exercises specifically designed to engage and strengthen the pectoralis major. The bench press and push-ups utilize pressing motions that activate the chest muscles, while dumbbell flys isolate the pectorals during the movement of bringing the arms out wide and then together, further emphasizing the role of the pectoralis major. Thus, the single arm French press does not serve the purpose of strengthening the chest muscles in the same way that the other exercises do.