Why it’s on the list: Chest flyes are hard for many trainees to learn with dumbbells or cables because the arms need to be locked in a slightly bent position for the duration of the exercise. Luckily, the pec deck simplifies things because it allows you to work in only one pathway. So, this exercise is a great movement teacher, and you can go for a great pump without having to balance any weights.
EMG data shows that activation of the pectoralis major and anterior delt are statistically similar between the pec deck and bench press, which means that even though you’ll probably be working in different rep ranges for each exercise, you’ll get great chest activation from this machine.
In your workout: Hit the pec deck last in your chest routine for sets of 10-12. Do dropsets and partial reps, pumping out as many as you can to failure.