These exercises work the entire chest and the posterior deltoids.
How to do:
1. Lie on a declined bench, feet firmly on floor.
2. Make sure that your butt, back, shoulders, and head are firmly positioned on the bench.
3. Your arms should be lightly bent and slightly wider than shoulders and your palms should be facing each other.
4. Keeping a slight bend in the arms slowly move them in an arc away from the body. Lower them until a comfortable stretch is felt in the chest/deltoid area.
5. Raise them along the same arc back to the starting position.