[Massage ball that approaches a wide range of muscles] The massage sphere allows you to massage deep into the body. By using your own body weight to roll the stiff massage ball freely, you can apply pressure where you need it and easily loosen it up. It is designed for a wide range of muscles, and the protrusion pattern on the surface works comfortably, making it the perfect tool for massaging the back muscles, glutes, quadriceps, hamstrings, etc. It is recommended to use it before and after training. It's about the size of a grapefruit that you can hold in one hand, and it's lightweight, so you can easily carry it on the go.