The weight bounces off the ends of the handle by the spring as it is shaken back and forth. ![]() How It WorksĪccording to the Shake Weight’s advertisements, it works by a method called "dynamic inertia." ![]() The package is shipped directly to your door and includes one Shake Weight, a workout DVD, and instructions. The men’s Shake Weight weighs 10 lbs and costs $29.99 before shipping and handling. The women’s Shake Weight weighs 5 lbs and costs $19.99 before shipping and handling. There are two versions of the Shake Weight: one for men and one for women. It can be purchased online, in some retail stores, and from television infomercials. ![]() It is sold by a company called Fitness IQ. The Shake Weight is a dumbbell in which the weights on either end are attached to the handle by a spring.
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