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From the stupidity that brought us the cordless jump rope, we have the shake weights. I'm sure you've seen/heard the jokes being made about the suggestive motion you make while using these. You might as well pickup a brick and shake it.
https://www.shakeweight.com/ver5/index.asp
Based on a completely new workout technology called Dynamic Inertia, which ignites the muscles in your arm, shoulders, and chest
https://www.shakeweight.com/ver5/index.asp
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