Shaun Zang, President of NSD Power (http://www.nsdpowerus.com) explains:
The NSD Spinner provides impact free resistance training to improve strength in the hand, wrist and forearm area. It’s a small, compact device that you can take with you anywhere and allow you to exercise and target the specific areas of hand, wrist, and forearm without having to visit a gym or carry a 15lbs dumbbell with you. The exercise is so simple you can do it while you’re working at your desk or watching TV during a commercial break.
It’s a hand, wrist, and forearm exerciser that uses the principles of a gyroscope to provide resistance training. As the rotor spins faster, the built up angular momentum will naturally resist the rotating motion of the exercise routine, and the faster the rotor spins, the more resistance it provides.
For athletes, professional and amateur alike, it provides powerful resistance training to an area that’s very difficult to target with regular weight training alone. You can rapidly improve hand and grip strength, which are vital to a lot of sports and activities, such as golf, tennis, baseball, and rock climbing. In addition, it strengthens the muscles and tendons in the wrist area and promotes healthy blood-flow to the carpal tunnel region of the hand to prevent repetitive stress injuries and carpal tunnel syndromes. For those who spend more than 8 hours a day in front of a computer or a keyboard, regular use of the Spinner can prevent or alleviate the onset of painful hand and wrist from improper posture or poor ergonomics.
If you have trouble starting the Spinner or keeping the Spinner going, start out slow. We offer “AutoStart” versions of our Spinner that has an internal tensioner, that allows you to wind up the Spinner and get it going at 3,000+ RPM to make it easier to maintain a good, healthy workout. However, the trick to starting and maintaining the speed of the Spinner isn’t how fast you can move your hand, but finding that natural “rhythm” or frequency in which it spins around the track in the gyroscope. With either the pull-string method or the AutoStart models, at 3,000RPM or below, you need to rotate your wrist slowly, at approximately one rotation per second, then speed up the rotation SLOWLY to increase the speed of the rotor. When you’ve matched the natural frequency of the gyroscope, you’ll feel the Spinner get slightly heavier with each rotation of the wrist. If you’re not matching the speed of the rotation right, you’ll feel or hear an audible click or knock within the rotor itself.
When shopping for a Spinner, be sure to look for the authentic “NSD” branding on the ergonomic rubber grip, or “NSD Power” stamped right into the rim of the outer shell along the edge of the rotor. We’ve found some competitor’s product to have inferior construct and design and may lead to additional wear and tear on your hand due to the high volume of vibration at even moderate speeds.
See our comparison video on our YouTube channel: http://www.youtube.com/watch?v=CvGnirSo4a4