3. Do A Second Upper-Chest Exercise
One way to target a lagging body part is to do more exercises that focus on it. What you do not want to do, however, is simply repeat what you did with the first move.
For instance, let’s say you did an incline barbell press for sets of 8 reps on the first exercise, and now you’re going to do another movement. Which of these would add a different stress to the target muscle?
A: The Smith-machine incline press on an adjustable bench set to the same angle as the fixed-incline barbell press for sets of 8 reps.
B: A dumbbell press with a lower degree of incline than you used on the fixed bench for sets of 10-12 reps.
I hope you chose B. If you want to change the training stimulus to work a target muscle in multiple ways, you should opt for different equipment, change the angle of the bench, and work with a different relative intensity. Just doing a second upper-chest movement isn’t enough unless you’re taking into account all these factors.