What is HRV-CV?

In this clip from Episode 364 of the WHOOP Podcast, Dr. Greg Grosicki and Dr. Kristen Holmes breakdown Heart Rate Variability Coefficient of Variation, or HRV-CV, explaining it as a measure of how stable your heart rate variability is over a seven-day period. Rather than focusing on noisy day-to-day changes, HRV-CV looks at week-long trends to assess recovery, resilience, and adaptation. A lower HRV-CV indicates more consistent recovery and greater physiological stability, while higher variability suggests the body may be under internal or external stress. Drawing on large-scale WHOOP data and athlete research, they highlight how this metric helps distinguish high performers and provides a more meaningful lens for training and performance optimization. Listen to the full episode: https://youtu.be/h6vTaNUOr7c Read the full WHOOP Research Study here: https://journals.physiology.org/doi/full/10.1152/ajpheart.00738.2025