像我这样情况的人很多。绝大部分人都不知道自己的睡眠时间到底有多长（确切点说，是有多短）。哈佛医学院睡眠医疗中心（the Division of Sleep Medicine at Harvard Medical School）执行董事拉塞尔•桑娜说：“大部分人对睡眠知之甚少。我们如今的社会是24小时全天无休，说到基本的健康知识，大部分人对睡眠健康根本一无所知，因为他们的医生就对此毫无了解。”
It's been almost a year to the day since Jawbone released the UP, a wristband computer that tracks motion -- the number of steps you take and the hours you sleep, mostly. Actually, it's been two years since the UP was first introduced, but in 2011 many of the bands failed, and the company apologized and pulled the product.
Last week, Jawbone released an update to both the band and its smartphone application which it's calling UP24 -- as in, 24 hours a day. Before, if you wanted to see how much you were walking or sleeping, you had to plug the wristband into the headphone jack on your smartphone. The band now has bluetooth, so it can send updates to the application running on your phone. And the app can send you push notifications that might prod you throughout those 24 hours to walk a little more or get to bed a little earlier, so you reach your daily health goals, which on the UP system default to walking 10,000 steps and sleeping for eight hours every day.
Despite my general skepticism toward products that make a game out of healthy living, and my sense that the people who purchase, and whose health is improved by, a $150 wristband are theleast of our health care system's worries, I've been using the UP off and on for a year now, and I like it. I like how unobtrusive it is, and how little I think about the fact that this thing on my wrist is tracking my movement. I like the few interruptions it causes in my day: vibrating angrily if I've been sitting for too long (an hour, in my case, but that's adjustable) and vibrating me awake in the mornings. The additional notifications, with the update, are unobtrusive too -- I've turned off pretty much all the push notifications and during my normal weekly routine I check in with the app maybe once a day. Maybe not. It's no big deal.
I'm a pretty bad user, but that's fine. The UP gives me a very rough sense of two rather important data points: walking and sleeping. As a New Yorker, hitting the 10,000-steps-a-day goal is fairly easy. My commute accounts for roughly 6,000 of those steps. Add in a 20 minute walk to lunch or after work, and I'm basically there. My sleep, on the other hand, is a mess. I honestly had no idea just how bad it was until I began wearing the UP.
I'm far from alone. Most people have no idea how much (or more accurately: how little) sleep they get. Russell Sanna, the executive director of the Division of Sleep Medicine at Harvard Medical School told me that there is just "a huge amount of illiteracy around sleep. We're a 24 hour society now, and since your doctor didn't learn about sleep health, you didn't either, when you were learning about basic health."
We don't sleep like we used to, we have more drugs to keep us awake than ever before (and still more coming), and culturally, working after just three or four hours of rest is viewed as heroic, when really it should be viewed more like showing up to work drunk. "When you're sleep-deprived, within 18 to 24 hours, your cognitive performance is equivalent to 0.1 alcohol in your blood -- 0.08 is legally drunk," says Sanna. Sleep, he adds, is a "gateway issue" -- it affects so much of our overall health that devices like the UP are incredibly important because "they make sleep part of a conversation we're only just starting to have."