WJS Wrist Trainer Powerball Arm Strengthener Essential Gyroscopic Wrist and Forearm Exerciser Ball


Strengthen fingers, wrists, hands, forearms, shoulders and bicep etc., and also be beneficial in promoting co-ordination and blood circulation.
Rehabilitates sore muscles and joint, great for musicians, guitarists, pianists, drummers.
Small, compact and transportable, you can take anywhere. Simple to start with a pull-string.And the ball with flashing LED
All you need do is to increase the speed by making a rotational wrist movement and to keep in sync with the spinning of the ball.
The faster you spin the harder your muscles work.
Gyro ball/Force ball/power ball/magic balls get model sport now.If you don't know how to play it,can search video via youtube
It is fun and good for hands,wrist,shoulder, forearms,biceps and good as warm-up sport before you do climbing,golf,basketball etc
Also if you use computer or play the piano for long time,you can play this ball every day for 15~20 minutes.You will feel you hand won't be so pain.
DO not drop the ball on hard surface at any time,the heavy rotor will damage.
DO not touch the ball rotor when it is spinning at high speeds,it will burn.