The rotation of the windmill shoulder trainer and waist twister is around the shoulder and waist. According to the relevant public information, if you relax your legs or stand naturally, and hold the handle of the wheel with both hands in the same direction or in the opposite direction, you can enhance the flexibility and flexibility of the upper limb joints, relax the shoulder joints, elbow joints and wrist joints during exercise, and have health care and rehabilitation effects on the shoulders, elbows and wrist joints. The use of outdoor fitness equipment such as waist twister can improve the flexibility and flexibility of lumbar spine and medullary joints, which is beneficial to bodybuilding. Large-scale waist rotation can relax waist muscles and get through menstruation.