Stand with both feet on the floor wider than shoulder-width apart, grip a kettlebell with the left hand, and bend the knees to squat down until the thighs are parallel to the ground. Reach the right arm behind the right leg and pass the kettlebell under the right leg, passing it from the left hand to the right. Swing the kettlebell around the outside of the right leg with the right arm and in towards the inside of the left leg while reaching the left arm around the outside of the left leg. Complete the figure-8 by passing the kettlebell from the left hand to the right under the left leg. Continue passing the kettlebell from one hand to the other for a desired number of repetitions.