Grab the pull up bar with a wide grip, the body is hanging freely. Keep your chest out and pull yourself up till your chin reaches the bar or it touches your neck, if you want to pull behind you. Go with a slow and controlled movement down, always keeping the chest out.

• Keep your head up
• Keep your chest out
• The elbows always point back, don't let them open sidewards

The diagram shows the most used muscles on this exercise