It is generally accepted that in CrossFit, three types of pull-ups are permissible to strengthen the muscles of the back: classic, kipping, butterfly. In today’s article, we’ll take a closer look at Butterfly Pull-Ups. What are Butterfly Pull-Ups? Butterfly Pull-Ups is a more advanced version of Kipping Pull-Ups. Professional CrossFit athletes use it to do the most reps in a short amount of time. This allows them to show good…