Yoga ball is also called fitness ball or yoga fitness ball. It is a ball sports tool for sports and fitness. The material is mostly made of soft PVC material. When the human body contacts it, the internally inflated fitness ball will evenly touch the contact parts of the human body, resulting in massage, which is beneficial to promoting blood circulation. The movement arrangement of yoga ball is aimed at the abdomen, back, waist and other main parts. During practice, it should cooperate with slow and rhythmic breathing to stretch and squeeze, so that the muscles can be effectively massaged, relaxed and consume fat. At the same time, it is also a way to improve the ability of concentration, reduce mental pressure and enhance the endurance of limbs and spine.