Forty-something Madonna maintains her twenty-something bod with a vibrating Power Plate machine. The machine whips anything into shape via vibrating plates that cause muscles from head to toe to relax and contract. Other reputed benefits: better posture, circulation and fat burning. Heidi Klum and Courteney Cox Arquette also shake it up.
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$2999 - $10,500; powerplate.com.Read MoreLess