Study: To boost your GPA, get some sleep
According to the study, for every extra day a student experienced sleep problems, they were 10% more likely to drop a course.
It's been known for a long time that college students don't get enough sleep, but this has too often been considered an unavoidable quirk of growing up, a baggy-eyed rite of passage to adulthood. However, a new study has quantified exactly how damaging lack of sleep can be to academic success and general health in college students, and it suggests that sleep problems don't have to be a quintessential feature of the college experience.
Using a large data set of over 55,000 college students, the study found that for every extra day a student experienced sleep problems, they were 10% more likely to drop a course, and their GPA dropped by 0.02. For freshmen, this could be disastrous; students who drop a single course in their first year are 16% less likely to graduate in the next six.
Moreover, the study found that sleep disturbances had a greater effect on GPA than being diagnosed with depression or anxiety. If you have a learning disability or are a frequent binge drinker, you would be more likely to stay in all of your courses than if you experience sleep disturbances. For first-year students, poor sleep has as much of an impact on academic performance as excessively drinking alcohol or using marijuana or other drugs—only prescription pill abuse was worse.
Poor sleep's compounding impact
Both students and educators recognize that poor sleep affects academic performance, but it's possible that they are underestimating the severity and systemic nature of poor sleep. Not getting enough sleep has a dizzying range of effects. It weakens the immune system, exacerbates underlying mental illness, increases the likelihood of being in a car accident, and encourages risk-taking behavior in general. Researchers have found that sleep deprivation is akin to being drunk. What's more, getting a good night's sleep is an essential, non-negotiable part of encoding memories and learning, which clearly matters for academic success.
According to the survey used in this study, students reported that the biggest challenges to their academic success were stress (34%), anxiety (26%), sleep difficulties (22%), and having a cold or the flu (17%). Not only do sleeping problems exacerbate and encourage all of these, but these issues prevent a good night's sleep, causing a vicious cycle.
This graph depicts the clear relationship between days with sleep disturbances and students' likelihood of having a C-, D-, or F-equivalent GPA (image by Monica E. Hartmann/J. Roxanne Prichard).
What can be done?
For the most part, universities have left the burden of sleep education on the students. According to the study, only 27% of students reported that they had received information from their universities about the impact of sleep on their health. Sleep education was outranked by education on tobacco use, nutrition, stress reduction, colds and flu, and many other health-related items. While educating students about these issues is important, developing and maintaining proper sleep hygiene may have a greater impact on students' performance in school and reduce their exposure to the health issues universities tend to prioritize over sleep.
In recognition of its importance, some colleges have implemented courses on the subject of sleep. NYU's While You Were Sleeping course covers both practical advice on how students can improve their sleeping habits as well as the science behind how sleep works. In a separate study on the impact of this course, it was found that students enrolled in While You Were Sleeping slept 22 minutes longer on average and fell asleep nine minutes quicker.
Educating students about managing their sleep schedules is certainly a positive, but institutions can also recognize that the sleep schedules of teenagers and young adults are fundamentally different than those of adults. Adolescents need nine hours of sleep per night, and their sleep undergoes a phase shift—meaning they are naturally disposed to go to sleep later and wake up later than adults.
High schools and universities that have delayed their start times reported improved attendance and academic performance. The U.S. Air Force Academy delayed their start time by 50 minutes and found that students not only performed better in their first class but also in every class throughout the day.
For bleary-eyed students reading this article, there are a few steps that can be taken straight away to improve your sleep. Going to sleep and waking up at the same time every day is probably the best place to start. Don't stay up late to cram for an exam or finish homework—you need sleep to remember what you've studied and to perform well. Avoid using electronics and anything with lights before bedtime since using these devices hampers the production of melatonin, the hormone that makes you sleep. The American Academy of Sleep Medicine has a list of further suggestions that will have you sawing logs the whole night through.
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