1. Hold the wrist ball with one hand, with the punishment part facing upward, and insert the plastic head of the rope into the small hole on the ball core with the other hand.

2. Turn the ball core forward with the thumb of the hand holding the ball, and tightly wind the rope in the central groove of the ball core.

3. When there are 7 to 8 cm left in the rope, stop turning the ball core, remove the thumb and hold the ball tightly, and quickly pull out the rope. Wrist ball is the abbreviation of wrist fitness ball, also known as power ball, magic ball, gyro ball and super gyro. It was invented in Taiwan Province Province, China, which is common in Taiwan Province Province, and then spread to Europe and America, and promoted all over the world.