Tips » Weight Training
How do I target my upper chest?
I don't believe there is a way to target the upper or lower chest. The chest is a group of muscles. Muscles are made of motor units. Motor units either contract or relax, no in between. The only muscle that has been shown to selectively recruit fibers in an area is the abdominal wall. You can't make the upper or lower chest bigger or smaller, this is a myth. What you can do is lose fat (to increase the definition of the cut in the lower chest) and then simply contract the chest to make it larger.
When you do inclines, instead of working the upper chest, testing with electrodes shows the entire chest contracts, but has less load and more tension is shifted to the shoulders. So the incline is great to work the chest and shoulders, it apparently does not target the upper chest according to what research and studies show to date.