Heart Rate Variability
https://www.outsideonline.com/2302726/how-heart-rate-variability-tells-you-when-hammer A pretty good overview of the value and application of Heart Rate Variability (HRV). Although I’m obviously not putting in the training hours comparable to a long-course triathlete, I still believe HRV is a valuable tool for the casual athlete. The body doesn’t particularly differentiate between the stress it receives from exercise versus numerous