It’s age old wisdom that if you’re not well rested, you may be more likely to get sick. Researchers at the University of California have now managed to quantify just how much of a difference it makes.
The scientists exposed 164 volunteers to the common cold. They then watched to assess the subjects’ ability to fight off the virus. Participants had their normal bedtime habits assessed before and after scientists administered the virus.
The researchers discovered that those who slept less than six hours a night in the previous week were 4.2 times more likely to develop cold symptoms compared to those who got more than seven hours.
Those who had less than five hours every night were 4.5 times more likely to get ill.
Those who got more than seven hours found themselves more easily fighting off the virus, confirming the age-old belief that getting enough shut-eye stops you getting run down and sick.