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Michelle Rodriguez starts every morning with a shock of about 300 volts to her right wrist. The 35-year-old in Germantown, Md., wanted a more aggressive alarm clock after sleeping through an important ...

Tired of waking up groggy no matter how much you sleep? Learn how sleep cycles really work—and how your alarm clock might be sabotaging your mornings. Discover science-backed tips to wake up feeling ...

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