如今，许多人都在使用睡眠追踪器来记录自己的睡眠。它们让人们对自己睡了多久有了更好、更客观的认识。不过，数据太多也有坏处。和努力健康饮食或锻炼身体不同，对睡眠想得太多、用力过猛反而会适得其反。高达30%的睡眠追踪者表示，他们对自己收集到的数据感到焦虑。

Most people now use sleep trackers to record their sleep. They give people a better, more objective sense of how long they slept. Too much data can have downsides, though. Unlike trying to eat healthily or exercise, putting more thought and effort into sleeping can backfire. As many as 30 percent of those who track their sleep report feeling anxious about the data they collect.

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