Iron ball, also known as fitness ball, has a long history. It is a traditional folk handicraft in Baoding, Hebei. At first, it was only circulated among the people as a kind of enjoyment or protective equipment. In the Ming Dynasty, there was a kind of stove specially made iron balls. The popularity of iron balls attracted the attention of the imperial court and began to collect tributes from the people. Blacksmith artists with unique skills were called into the palace to make iron balls for the royal family and dignitaries to enjoy. It is also a favorite sports equipment of Baoding people.

Four benefits of rotating iron ball:

1, which can strengthen blood circulation.

2. It can enhance physical strength.

3, it has a certain brain-strengthening effect.

4. It has antihypertensive effect on patients with hypertension.