Place your arms on each padding of the pec deck machine, get a good grip on the handles, while you are seated. Keep back straight and chest out. Inhale.
Exhale as you push with both arms to meet towards your chest but not covering your face.Use your chest muscles more when pushing, using your arms only to guide them to the center. Concentrate on your inner chest to get a good "burn". You will feel the inner part of your chest compress. Slowly release your hands back to the original position while inhaling. You will notice your chest expanding so just go with the flow. Expand your chest while your arms are stretched out. This will work the outer muscles of your chest.
Primary Muscle
