What is the DEADLY DOZEN I am loving this sport. The Deadly Dozen is a fitness race that was designed to be one of the hardest yet most accessible and scalable fitness races in the world. The race consists of 12x 400m Runs around an Athletics Track and 12x Labours (Exercise Stations). The Labours only use Bodyweight (BW), Kettlebell (KB), Dumbbell (DB), and Weight Plate (WP) exercises, meaning every well-equiped gym, even home gym, has the equipment needed to train for the ra