There are a lot of sports equipment in our community, among which I think the most interesting one is a piece of equipment with a dark blue pillar in the middle and two small yellow cylinders rolling up and down. Its appearance is simple and its usage is simple. As long as you put your calf on that yellow cylinder and roll it back and forth, it will play a massage role. Not just calves, thighs, arms. . Both will do. When your muscles are sore, it is your good helper. I like it very much. I hope everyone can also exercise and stay healthy during the winter vacation.