The decline machine press predominantly targets the lower portion of the chest, however in general any chest excercise will target the entire chest area.
To start, adjust the seat so that the bar where you place your hands is in line with the center of your chest. Your shoulders should be pinned back, and pressed downwards. You can choose between a wide grip and elbows flared out - which will target the chest more/triceps less, or a narrow grip and elbows tucked in more which will target the triceps more and chest less. Once ready, press upwards and hold when fully extend, slowly coming back to the starting position.
If you are looking for a safe and effective way to build muscle mass, improve your posture, and reduce back pain, the decline machine is a great option - building muscle mass in your lower chest.
Olympic Flat Bench
Olympic Incline Bench
Olympic Decline Bench
Flat Machine Press (Plate Loaded)
Incline Machine Press (Plate Loaded)
Decline Machine Press (Plate Loaded) (This Machine)
Pec Deck/RearDelt Machine