How to do it Grasp the bar with an overhand grip with your hands just wider than shoulder-width apart. Let your body hang straight down with your arms fully extended. Pull up and squeeze your lats until your chin is over the bar, before lowering slowly to the start position without swinging.

Where can I do pull ups in public?

Use bars at a playground in a public park to do pull ups.

Use the bar of a swingset, or any other type of bar or wooden beam that is part of the playground, to do pull ups if there are no monkey bars. Some public parks even have dedicated pull up bars set up.

Is it safe to do pull ups on a door?

Do not use doors with glass panels. Pull-ups are a demanding exercise--only perform this exercise is you are sufficiently strong. Make sure you are not wearing anything that will scratch the door such as a heavy belt buckle.