We'll get you over the bar.
Why is everyone doing these
Why the combos?
As you get stronger you’ll need to lower the assistance to account for your new strength. For example, a robust (purple) combined with a heavy (black) band offers roughly the same amount of resistance as the power (green) band, but the combination gives you three different levels of assistance: heavy, robust and both.
This also allows you to do drop sets with just the robust band until you can’t do any more reps and then add the heavy band to eek out a few more.
Traditional pull-ups are extremely challenging! There’s no way around it. Assisted pullups are a great way to get started and the only way to extend a session.