How To Do 21's - The Latest Exercise Craze For Huge Biceps

Summer is fast approaching, which means that “sun’s out – guns out”. If you want to build a set of arms, or guns, as people sometimes refer to them as, then you’ll need a solid routine in place to really maximise your gains.


This is a companion discussion topic for the original entry at https://gymgeek.com/exercises/arms/how-to-do-21s-the-latest-exercise-craze-for-huge-biceps