Sleep deprivation is so much a part of American culture that many people don’t even see it as a problem — and some people will actually brag about how little they can “get by” on. But the truth is that there are serious consequences to not getting enough zzzz’s at night: the Sleep Foundation notes that, each year, there are 100,000 car accidents, 76,000 injuries and 1,500 deaths that occur due to not getting enough rest.
Here are ten important things that can happen when you don’t get enough sleep:
1. Weight Gain
Multiple studies have shown a link between weight gain and lack of sleep. In one study, people who were sleep deprived ate 300 more calories a day than when they were able to get a full night’s sleep — and those 300 calories can add up over time. Also, lack of sleep causes the body to become stressed, which increases levels of cortisol, a stress hormone that signals that body that it needs to put on fat.
2. Impaired Thought Processes
Most people realize that they tend to feel foggier or less able to concentrate if they have had a late night. This is because going without even one night’s sleep can decrease alertness and other mental processes by 32%; with one study even finding that over a lifetime, the brains of those who are chronically sleep-deprived become smaller and less dense, affecting many important mental processes.