Ensure you can reach the pull up bar without jumping. If you’re unable to place a step underneath the pull up bar.
Grab the pull up bar with approximately 1.5x shoulder width.
This is your start and end position of every repetition.
Pull yourself towards the bar, once you’ve reached a position when you can pull no further, this is your end range.
Pause for a moment, before reversing the movement to the start/end position.