Yes, you really need 8 (or 7) hours
Are you envious of those people who can run on nothing but a cup of black coffee and 3 hours of sleep while you get drowsy despite going to bed at 9:30? Take heart -- apparently the “I’ll sleep when I’m dead crowd” might be getting their wish sooner than they bargained for.
According to research conducted by Dr. Clete Kushida, director of the Stanford Center for Human Sleep Research and president of the World Sleep Federation (yes, that’s a thing), “Some of the repercussions of sleeping less than 7 hours on a regular basis is a higher likelihood of weight gain, obesity, diabetes, high blood pressure, heart disease, stroke, depression, and an increased risk of death.”
Gulp. So next time that overachieving somniphobic friend of yours brags about how little shuteye they need, show them the video of Dr. Kushida dissecting their argument piece by piece with the cool demeanor of a man who has slept exactly seven hours every night for the last 60 years. (This is just a guess.)