“Iron Lung” AMRAP 4: 27/20 Calorie Row 27 Wallballs (20/14) 27 Pull-ups rest 4 minutes AMRAP 4: 21/15 Calorie Row 21 Wallballs (20/14) 21 Toes to Bar rest 4 minutes AMRAP 4: 15/10 Calorie Row 15 Wallballs (20/14) 15 Pull-ups