Back in January, Fitbit gave me an exclusive deep dive into its 6 billion nights’ worth of sleep data. All kinds of cool takeaways resulted. So I couldn’t help asking: Would they be willing to offer me a similar tour through this mountain of heart data? They said OK. They also made a peculiar request: Would I be willing to submit a journal of the major events of my life over the last couple of years? And would my wife Nicki be willing to do the same? - finance.yahoo.com