Mobility Warm-up 3 X 10 Seconds Hollow Body Hold 10 Hollow Body Rocks 10 Walking Lunges 10 Push-ups Fitness Level Substitution: Banded Push-up OR Knee Push-up 10 Air Squats 10 meters of Duck Walking 10 Arm Circles Backwards 10 Arm Circles  Forward Skills / Strength Using a kettlebell for these movements will be new to most CrossFitters….