Wrap a band around the bar. Place your foot through the loop and the band will assist you in your pull. Remember to start in a dead hang on the bottom, pull up until your chest touches the bar, and don't swing your legs. Once you can do 5 consecutive reps with a band, it's time to move down to a lighter sized band or to bodyweight pull-ups. This is going to make it harder again. You may only be able to do 1 or 2 now. Do as many as you can in your progression before going back into your previous band.
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