Here we will remain on the floor for a 5 min upper body and corethe central part of your body. It includes your pelvis, lower back, hips and stomach. The stomach muscles sometimes are called abs. More kettlebell exploration. One light kettlebell works well and you could adapt the movements with double bells also. Remember that for safety we never want to hold a kettlebell over our face while lying on the floor or lift it over our face.