PERSONAL TRAINER INSTRUCTION :
Using a grip with your palms facing towards your head (supinated), pull your body up until your chin is the same height as your hands.
Focus on pulling the elbows down to the ground and keeping your shoulders depressed. This will help keep the back engaged throughout the movement. Keep your chest upright with a neutral spine. Exhale as you pull up.
There are many variations to pull ups so be sure to research other hand positions before beginning. If you are not strong enough to do a pull up, practice using an exercise band to assist you in the pull or jump up and slowly lower yourself down.