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| A multi-institutional team of researchers conducted the first study to evaluate how the duration of nightly sleep early in the semester affects first year college students end-of-semester grade point average (GPA). Using Fitbit sleep trackers, they found that students on average sleep 6.5 hours a night, but negative outcomes accumulate when students received less than six hours of sleep a night. The results are available in the Feb. 13 issue of the Proceedings of the National Academy of Sciences.一支由多机构组成的研究团队首次评估了学期初晚间睡眠时间对大学新生期末平均绩点 (GPA)的影响。研究人员通过Fitbit睡眠追踪器，发现学生平均每晚睡眠时间为 6.5 小时，当学生每晚睡眠时间少于6小时时，负面效应就会累积。该研究结果2月13日发表在《美国科学院院报》上。 |
| David Creswell, the William S. Dietrich II Professor in Psychology and Neuroscience at the Dietrich College of Humanities and Social Sciences, led a team of researchers to evaluate the relationship between sleep and GPA. College students often push themselves to achieve. |
| “Animal studies have shown how critical sleep is for learning and memory,” said Creswell. "Here we show how this work translates to humans. The less nightly sleep a first year college student gets at the beginning of the school term predicts lower GPA at the end of the term. Lack of sleep may be hurting students’ ability to learn in their college classrooms.”克雷斯维尔说：“动物研究表明了睡眠对学习和记忆至关重要。我们的研究论证了睡眠对人类学习和记忆的影响。大一学生在学期初的夜间睡眠越少，预示着学期结束时GPA越低。睡眠不足可能损害了大学生的学习能力。” |
| The study evaluated more than 600 first-year students across five studies at three universities. The students wore wrist Fitbit devices to monitor and record their sleep patterns. The researchers found that students in the study sleep on average 6.5 hours a night.该研究对三所大学600多名大一学生进行了5项研究。学生在手腕上佩戴Fitbit设备来监测和记录他们的睡眠模式。研究人员发现，参与研究的学生平均每晚睡眠仅为6.5小时。 |
| “Once you start dipping below six hours, you are starting to accumulate massive sleep debt that can impair a student’s health and study habits, compromising the whole system,” said Creswell. “Most surprising to me was that no matter what we did to make the effect go away, it persisted.”克雷斯维尔说：“一旦你的睡眠时间开始低于 6 小时，就会开始积累大量的睡眠债，这会损害学生的健康和学习习惯，从而危及全局。最令我惊讶的是，无论我们采取什么措施来消除这种影响，它都会持续存在。” |
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