Muscle ups Posted October 31, 2016 by cf1855 CrossFit 1855 – CrossFit Gymnastics Muscle-ups 15 min muscle-up practice (sub strict pull up development) Metcon Metcon (AMRAP – Reps) 21 min EMOM: 1 – 50 DU 2 – 15 wallballs (20/14) 3 – 9 burpee box jumps (24/20)