What is HRV and why should I care?
What the hell is HRV? Heart rate variability, or HRV for short, is the rhythm of your heartbeats. It turns out that the heart doesn’t beat like a metronome; it beats irregularly. The irregularity isn’t random; it directly reflects your autonomic nervous system, which comprises two branches, the parasympathetic and sympathetic. Think of the parasympathetic …
