There have been less opportunities to do exercise or muscle training, I purchased an easy-to-use training equipment.
It is called a “Power Ball” or “Wrist Ball” and is used by holding with one hand.
It has a double structure of a ball and an outer ball that wraps it, and after winding a power spring to start the ball, turning the wrist to match the rotation of the ball will increase the number of rotations of the ball. , The gyro effect creates a force that causes the outer ball to move. By countering that force, you can strengthen your muscles.
Depending on how you hold it, you can train from your fingertips to your upper arm, but unlike training equipment such as dumbbells, you can train without overloading your muscles. Because it is small, there is no need to worry about the storage space. There is also a function to change the color and emit light according to the number of rotations, and to display the number of rotations and rotation speed.
When I opened the attached instruction manual, there was the word “patent”.
I haven’t seen many products with numbers lined up by country. It seems that 3 cases are registered in Japan. When I searched for Japanese numbers on J-PatPat, all three were registered as utility models. (Syszo)