Can Tracking Your Health Drive You Crazy?

I spend, on average, 128 minutes in REM sleep per night. I require a minimum of 1,400 calories per day to stay alive. My resting heart rate hovers around 57 beats per minute but spikes to 65 when I'm answering e-mail or talking to my husband on the phone.

I know all this because I recently spent two weeks following my body's statistics with as many devices, Web services, and phone apps as i could manage at once. Inspired by a growing group of extreme self-trackers—people who attempt to quantify their everyday activities (everything from exercise to sleep to sex) in order to gain insight about themselves—I set out to answer two questions: Would monitoring myself inspire me to adopt a healthier lifestyle? And what would happen to my peace of mind if I turned my life into a data sheet?

For O, the Oprah Magazine, I find out whether keeping tracking every aspect of your health can actually drive you insane.