What is Heart Rate Variability and Will it Really Help my Running?

Finlay wears his sports scientist hat in this episode while Chris grills him about heart rate variability (HRV) - the long-celebrated metric in sports science that measures the time variance between heartbeats to give an indication of stress and how prepared the body is to perform. The new Garmin Forerunners 255 and 955 both come with long-term HRV tracking functionality, meaning Garmin watches are now providing something recreational athletes previously needed a Whoop band and subscript...