1) Find the parallel dip bars. If the width of the bars is adjustable make sure that they are at shoulder width or wider.
Grab the bars and lift yourself in the air. Keep your feet separated and bent at your knees. Contract your glutes and abs to stabilize your body.
This is your starting position.
2) The goal of this exercise is to remove the stress from the triceps and shoulder and focus more on the chest.
When you are lowering yourself lean forward with your chest and look down throughout the movement. Keep your elbows slightly flared.
Looking down, instead forward, will help ensure that you lean forward.
Slowly lower yourself as far as your shoulder flexibility allows you.
3) Once fully descended push yourself back up to your starting position. When at the top do not fully extend your elbows and keep a slight bend.
If you lock your elbows you remove the tension from the muscle and place it on the elbow joint.