Photo: Courtesy of Jawbone
One hour and 59 minutes were light, two hours and 27 minutes were deep. I also know how long it took me to doze off, and that I woke up twice. I know all this because I'm the proud (but exhausted) owner of Up, a supersophisticated wristband containing sensors that track daily sleep and movement and record them via an iPhone app. I'd explain how having all this data helps you make smarter health choices, but clearly, I need to lie down.