I got a fitbit charge for Christmas.
It's a digital watch that also tracks your steps, your sleep, your elevation gain, acts as a silent vibrating alarm clock on your wrist, and gives caller id for your cell phone.
The most interesting thing to me is the sleep tracking feature. I've always felt like I slept poorly. I fall asleep easily but feel like I toss and turn all night. I'm constantly waking up, rolling over, and falling back asleep. Sometime my pillow case comes clean off by morning time because I'm moving around so much.
Now I have a couple weeks of data that confirm this feeling.
These are screenshots off my phone, which is bluetooth synched to my watch.
Total hours of sleep each night for a week. This actually looks pretty good. Could be much worse.
But when we look at how many time I wake up during the night or am restless, the picture becomes a little more grim.
Friday actually looks not so bad, but I gave the device to my wife to wear, so I could see what another person looks like as they sleep.