Even people with insomnia sleep well from time to time. “I know on a sunny day after I’ve had a good night, I’m almost high,” Mary, a writer and former teacher, told me as we sat talking over cups of tea.
The day is wonderful after a good night’s sleep. But what about mornings after really bad nights?
Short sleep—sometimes defined as sleeping less than 6 hours a night, and other times defined as sleeping less than 5—is associated with a higher risk of hypertension, obesity, and type 2 diabetes, investigators at Penn State Hershey have said. Some research has even shown there’s a link between short sleep and increased mortality.
Now a new study finds that short sleep also has effects on personality.