The advantage of the medicine ball figure-eight grip is that it is not easy to let go. According to relevant information, the figure-eight grip of a medicine ball is to clasp the two thumbs tightly on the back and top of the ball to form a figure-eight shape to maintain the stability of the ball. The figure-eight grip method is not easy to let go. It is suitable for people with strong arm strength to hold the magic arm with crab claws. Long, suitable for people with strong waist and abdominal muscles.