I am looking for very advanced, intense workouts or collections of exercises using only a resistance band.
I am primarily interested in free online resources with good pictures or videos. However suggestions for printed books would be interesting, too.
You may say that this is a kind of google question, however I searched the web for hours and didn't find good references. So I think it would be a good idea to collect here some good references on that topic - perhaps this question should be community wiki.