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Does the Shake Weight Work?
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It's an infomercial mainstay and the punchline of many comedians' off-color jokes. But does the Shake Weight actually build muscles? The answer may not please those who already invested $20 for the women's version or $30 for the men's. While the shake weight may help define muscles in the arms, that's all it does. It won't burn fat like aerobic exercise would, so it doesn't let you off the hook on the treadmill. And while it may seem like the shake weight offers more bang for your fitness buck when it comes to dumbbell exercises, that's not the case. The range of motion isn't the same; in fact, the shake weight limits your range of motion, which won't give you optimal results if you're looking for toned arms. And that "dynamic inertia" claim the infomercial makes? Just jargon - all it boils down to is movement, and it applies to all resistance training.
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