It's called the Power Plate, and you're supposed to perform exercises on it while it vibrates to "stimulate" more muscle fibers.

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Every day God gives me, is an opportunity to take another step closer to my spriritual, personal and professional goals. I will use today so that tomorrow... next week... next year, I may look back and be proud of the choices I made, the people I've touched and the goals I've accomplished.

-My Personal Mission Statement