With the proliferation of new wearable technology (including the Oura ring and Whoop band), you may have heard the term - heart rate variability - as a new way to track your recovery and readiness on any given day.  It seems simple on the surface, but it's a little more complicated in application than you might think. In this episode, Jason and I break it all down in an attempt to explain heart rate variability including what it is, how to track it, and most importantly, how to apply it in your training.