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Shape and tone your entire upper body in just six minutes per day with the Shake Weight dumbbell. Designed specifically for women, the Shake Weight dumbbell is based on a completely new workout technology called Dynamic Inertia, which ignites the muscles in your arm, shoulders, and chest. As you hold the Shake Weight, it pulsates back and forth, challenging your muscles while you hold it steady. Scientific studies indicate that the Shake Weight increases your upper body muscle activity by more than 300 percent compared with traditional weights.
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543 days ago
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