Quick question: How many hours of sleep did you get last night? 6 hours? 7? 4.5?

Some people are secretly proud that they don’t get much sleep, and they wear their sleep deprivation like a badge of honour: “I’m damn shag today because I had soooooo little sleep last nigh…..zzzzzzz.”

But when you don’t get enough sleep, you pay a bigger price than simply feeling a little groggy.

First, there’s the whole host of health consequences like obesity, permanent memory loss, and increasing your risk of heart disease and cancer.

But not sleeping enough also has profound side effects on your mood, alertness, and your ability to be a top performer.

An experiment conducted by the University of Pennsylvania (alma mater shoutout!) and Washington State University studied 4 groups of people: Group A slept for 8 hours a day, Group B slept for 6 hours ...