HRV Scientist: The NEW HRV Metric That Could Help Runners Over 40 Keep Improving

<p>In this episode of The Endurance Lab, I sit down with Dr. Greg Grosicki, Staff Research Scientist at WHOOP, to explore the science of HRV and HRV-CV and, more importantly, how runners can actually use these metrics to make smarter training decisions.</p><p>We break down why higher HRV is generally better while lower HRV-CV is generally better, why your seven-day HRV trend can tell you something very different from today's reading, and what different combinations of HRV and HRV-CV may reveal about recovery, adaptation and accumulated training stress.</p><p>We also get practical. What should you do when today's HRV is suppressed but you feel great? When should HRV actually cause you to change a planned interval workout? What happens to HRV-CV during a hard training block or taper? And can these metrics help runners recognize when they're adapting well versus drifting toward excessive fatigue?</p><p>For runners over 40, we also explore an especially interesting question: how do HRV and autonomic stability change as we age? Greg discusses research showing age- and sex-related differences in HRV-CV, what may happen after around age 40, and whether exercise and fitness could help attenuate some of the age-related decline in HRV.</p><p>In this episode, we cover: what HRV-CV actually measures; HRV vs HRV-CV; why HRV should be compared to your own baseline; whether wearable HRV measurements can be trusted; heat stress and HRV; daily HRV vs seven-day trends; four HRV/HRV-CV training scenarios; when to train hard versus back off; HRV-CV as a marker of adaptation; what happens during overload and tapering; HRV recovery and resilience; how HRV-CV changes with age; autonomic aging; and how Zone 2 and high-intensity training affect HRV.</p><p><br /></p><p>➡️ Join The Endurance Lab Inner Circle on Telegram</p><p>👉 https://t.me/TheEnduranceLabInnerCircle</p><p><br /></p><p>🔥 FIND YOUR TRUE ZONE 2 WITH TYMEWEARTymewear Vita Pro measures your breathing in real time to identify your individual physiological thresholds and help you train at the intensity you actually intend to train at.</p><p>➡️ Endurance Lab listeners SAVE $100 OFF the Tymewear Pro Training membership </p><p>Code: E-LABTW26</p><p>👉 https://www.tymewear.com/E-LABTW26</p><p><br /></p><p>➡️ Listen to my conversation with TimeWear founder Anar Larson: </p><p>👉 https://open.spotify.com/episode/5sz25EZjGUHoGSaA38nHwM</p><p><br /></p><p>➡️ Previous Endurance Lab HRV episode with Dr. Marco Altini</p><p>👉 http