NSD PowerBall

If you as a kid sat on the chair with the spinning wheel to get a feel of a gyroscope and still had questions, welcome to the club. This toy gives you the feel of how nature resists the change in angular momentum. I'll say its ingenious how this concept is used to make this into an exercise equipment for your wrists and forearms. Even though I use the term toy, this "toy" can give your forearms some serious workout in less than a minute. The ball states that it is capable of spinning at 250Hz which is equivalent to 250x60 = 15,000 rotations/minute amazing! There are mentions on sites, where people have taken this to 16,000 rpms (these people must have "power balls"). The scorecard of top 100 speeds are maintained here. Also, there is a steel version available, capable of 350Hz. I can personally vouch for this to strengthen your wrists and fore arms. The site claims that Powerball can help in fighting carpal tunnel syndrome, tendinitis, tennis elbow and other wrist (& arm) ailments - and I have no reason to disbelieve their claims. More over the science of gyroscopes (something tethered to space and resisting change) still fascinates me. Just think about it for a minute...



http://www.powerballs.com/