Instructions
Set the height of the straps so that you can sit beneath them and only just reach the handles with outstretched arms
Take grip of the handles and use your back and arms to pull your body upwards. Aim to get your upper chest to the same level as the handles.
Hold the top position for a second, and then lower your body, steadily, back down to the starting position.
Be sure not to use your legs to aide the pull up.