研究表明 每晚都在同一时间睡觉的人更健康
People who go to bed at the same time every night are far more healthy and successful than their more spontaneous peers, new research reveals. While the growing swell of sleep research tends to focus on the amount of time we sleep, scientists at Brigham and Women's Hospital have found routine is just as key. A team measured sleep and circadian rhythms in 61 undergraduates at Harvard College for 30 days using sleep diaries, then compared that data to their academic performance. Overwhelmingly, students with irregular patterns of sleep and wakefulness had a lower grade point average than the rest. They also tended to hit snooze more often, rather than bounding out of bed, and struggled to get sleepy, due to irregular releases of melatonin - the hormone that makes us want to sleep. It suggests a more inconsistent routine prevents your body from releasing hormones at the right time to make you feel sleepy and awake, thereby throwing off your circadian rhythm (body clock). In the study, the researchers quantified sleep regularity using the sleep regularity index (SRI), a newly devised metric. They examined the relationship between the SRI, sleep duration, distribution of sleep across the day, and academic performance during one semester. Our results indicate that going to sleep and waking up at approximately the same time is as important as the number of hours one sleeps,' said Dr Andrew Phillips, a biophysicist at the Division of Sleep and Circadian Disorders, Brigham and Women's Hospital and lead author on the paper. Sleep regularity is a potentially important and modifiable factor independent from sleep duration,' Dr Phillips said. |