For many young people, similar scenarios play out every day. Surveys show that 69.3 percent of young people go to bed after 11 p.m., and 52.5 percent choose to stay up late on their own accord. [1]

　　When you stay up wildly at night and are sleepy as a dog during the day, you naturally have to find a way to catch up on your sleep. Subway squint against the wall, lunch break on the table to sleep for a while, such as toilet sitting toilet nap …… make up for sleep in a variety of ways.

　　After the nap, many people feel that the efficiency of the work is back, the brain directly full blood resurrection. After staying up late to make up sleep is really so useful? A recent new study may be able to give the answer.

　　Stay up late and nap during the day? It's still cognitively damaging!

　　Like me, many people think that staying up late doesn't matter, and that after some maneuvering, if they just find time to take a nap during the day, it won't cause any harm to their bodies, but it doesn't.

　　Researchers at the University of Pittsburgh and Michigan State University conducted a trial on sleep and cognition, which recruited 275 participants. All participants were required to complete cognitive learning tasks (occupancy task, vigilant attention task) on the first night.

　　Then, the researchers randomly assigned all participants to 3 groups. In the first group, participants went home and slept; in the second group, participants stayed up all night and were not allowed to nap; and in the third group, participants stayed up all night and were allowed to take a 30-minute or 60-minute nap. The next morning, all participants were re-enrolled to complete the cognitive learning task.

　　The results showed that the stay-up-late and catch-up group made more mistakes in the cognitive learning task than the go-home-and-sleep group, and catching up on sleep did not bring much gain to the participants. This shows that staying up late and napping during the day did not fully mitigate the cognitive harm caused by sleep deprivation. [2] A related paper was published on June 22, 2021 in the journal Sleep.

　　Don't stay up! Staying up late hurts your brain and your whole body, and catching up on sleep doesn't help either

　　As you can see from the above, napping after staying up all night has no way to fully mitigate the cognitive damage caused by staying up all night. And on February 28, 2019, published in the "Current Biology" (Current Biology), a study shows that make up sleep is no way to make up for the metabolic problems brought about by sleep deprivation.

　　The experiment lasted nine days, and the researchers divided the participants into three groups: a normal sleep group, which slept nine hours a day; a stay-up group, which slept five hours a day; and a stay-up weekend catch-up group, which slept five hours a day for the first five days, slept casually for two days on the weekend, and slept five hours a day for the last two days.

　　In the experiment, stay up late weekend sleep group participants weekend energy intake becomes less, but the other time energy intake is still a lot of energy intake, the overall energy intake has not been reduced, the weight is still showing an upward trend. What's worse, they were less sensitive to insulin compared to the stay-up-late group. [3] This shows that catch-up sleep behavior does not have much effect on metabolic problems caused by sleep deprivation (e.g., weight gain, decreased insulin sensitivity, etc.).

　　Guys, don't stay up late and go to bed early.