Mostly, yes. Heart rate variability ties into the sympathetic and parasympathetic nervous systems. When both are in balance, heart rate will fluctuate with the alternating activation of those nervous systems. Although…
Who's out here speculating on roads?
To be out for blood is to seek revenge. I read "Give up blood sport" as a caution against doing so.
Mostly, yes. Heart rate variability ties into the sympathetic and parasympathetic nervous systems. When both are in balance, heart rate will fluctuate with the alternating activation of those nervous systems. Although…
Who's out here speculating on roads?
To be out for blood is to seek revenge. I read "Give up blood sport" as a caution against doing so.