what is a muscle up
Editor's Picks. The muscle-up is one of the most coveted CrossFit exercises that takes a ton of strength and practice to master. In concept, a perfectly executed muscle-up may not look all that difficult to master, but the grip and the movements often prove a bit unnatural for anyone trying for the first time.he Four Steps to a Muscle-Up. STEP ONE: Hang from a pull-up bar with a false grip (thumbs on top the bar, not around). STEP TWO: Pull yourself up (chin to the bar).