Invention Grant
US08235875B2 Kinetic dumbbell 失效
动力哑铃

Kinetic dumbbell
Abstract:
A kinetic dumbbell of the present invention includes a handle and two weight devices connected to opposite ends of the handle. Each of the weight devices has an annular channel and at least a ball received in the annular channel. The balls are running in the endless annular channels to provide an extra vibration effect while training with the kinetic dumbbell of the present invention.
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