statistical signal processing

  • What Your ‘Heart Rate Variability’ Says About Your Health

    What Your ‘Heart Rate Variability’ Says About Your Health

    One feature a number of fitness trackers offer is a metric called “heart rate variability,” or HRV, which is the interval of time between each heartbeat. But given that we tend to think of our hearts beating at a steady and predictable pace, the fact that the interval between each beat varies can be a…