The primary muscle group targeted by the bench press is the pectoralis major. This is the muscle group that makes up the bulk of what we consider to be the chest. With modifications of the bench, either an incline or decline, you can also target the pectoralis minor, or lower pectorals, as well.
Read more: http://www.livestrong.com/article/104033-muscles-bench-press-workout/#ixzz1gRNXh2w1
No.
The primary muscles used in the bench press (all variations) is the triceps with some front delt assistence and a tiny bit of chest involvement at the bottom, where the move somewhat mimics a flye movement. Your triceps will give out way before your chest was worked to failure in that tiny ROM anyways....
The function of the pecs is to bring the upper arm across the body, it isnt a fucking pressing movement.
Notice how EVERYONE in your gym benches and pretty much no one has decent pecs?
Most overated excercise there is and shoulder wrecker for many.
