Case study: I used my fitbit ionic to chart my first date heart rates... this is the best date versus the worst. As a meteorologist, I've really enjoyed looking at the patterns
What Is a Good Heart Rate for My Age? Normal & Dangerous
Why Is My Heart Racing? 10 Surprising Reasons | SELF
Is it worth buying a fitness tracker with heart rate monitor? - Quora
Why knowing your normal resting heart rate is important to your health - Insider