Why You Feel Lousy after You Go Back to Sleep

You may be tempted to go back to sleep if you wake up too early on the weekends. But here’s why you feel so lousy after doing so.

Are you tired fromtoo much sleep? - Harvard Health

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Night Sweats Causes: Experts Explain Why You Sweat In Your Sleep - The New York Times

Sleeping When Sick: Can You Sleep Too Much?

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Feeling Sick After Vacation Is More Common than You Might Think