In case you've been living under a rock for the past 20 years (and if so, you're probably well rested, so this wouldn't apply to you), Americans need more sleep. Seven to nine hours is the sweet spot for waking up refreshed, and as anyone who has pulled a late-nighter with her Netflix queue knows, getting less than that can leave you groggy, cranky, and way worse. Just one night of insufficient shut-eye can slow your job performance, derail your gym routine, and even sabotage your relationships, new research shows. But worry not, weary eyes. We've pinpointed exactly what suffers when you're sleepy and how to sidestep those problems and feel wide awake.
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One bad night's sleep reduces the body's ability to process sugar the next day and leads to greater fat storage, a study in the Journal of Clinical Endocrinology & Metabolism found. According to Amy Jamieson-Petonic, RD, a spokeswoman for the Academy of