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睡前长时间上网影响睡眠 Sleepy? Cut out late-night Internet and TV "While many people use electronic media, such as the Internet, it should be noted that the longer media use before sleep can trigger (self-perceived) insufficient sleep," lead researcher Dr Nakamori Suganuma, of Osaka University, Japan, told the reporter. He and colleagues obtained data on self-perceived sleep problems and the use of electronic media prior to bedtime from a total of 5,875 Japanese respondents in two separate Internet-based surveys. Their findings are published in the journal Sleep and Biological Rhythms. Nearly half of the respondents associated their lack of sleep with electronic media use before bedtime. Those reporting longer electronic media use were also more likely to report insufficient sleep. Overall, 29 percent of light users (less than 1.5 hours) listed electronic media use as a possible cause of their insufficient sleep. By comparison, 40 percent of medium users (1.5 to 3 hours) and 54 percent of heavy users (more than 3 hours) said the same. However, longer Internet and television use before bedtime did not correlate with less actual sleep. While heavy users averaged about 3 more hours in front of computer or television screens than light users, the heavy users averaged only about 12 minutes less pre-workday sleep time than light users. Notably, Suganuma said, "Internet use affected self-perceived insufficient sleep more than TV watching ... not only in younger Internet users but also in middle-aged or aged Internet users." | 
