You'll need a pull-up bar (or a table) and some patience. It takes some time to build up to doing a proper pull-up.
- Place a plyo box directly underneath the pull-up bar and stand on it.
- Jump up and grab the bar while simultaneously pulling yourself up into a pull-up.
- Hold the pull-up as long as you can and then slowly begin lowering yourself to the floor (as slowly as possible).
- Once your arms are fully extended, release so that you land standing on the box again.
- Perform as many as you can and aim to do at least five.