Brain Fact Friday ”Review of Heart Rate Variability: The Most Important Biomarker for Tracking Health, Recovery and Resilience.”

Welcome back to The Neuroscience Meets Social and Emotional Learning Podcast, where we cover the science-based evidence behind social and emotional learning (for schools) and emotional intelligence training (in the workplace) with tools, ideas and strategies that we can all use for immediate results. I’m Andrea Samadi, an author, and educator with a passion for learning specifically on the topics of health, wellbeing and productivity, and launched this podcast to share how important an understanding of our brain is for our everyday life and results--whether we are a teacher or student in the classroom, or in working the modern workplace. For today’s Brain Fact Friday, I wanted to revisit a topic that we have covered once already on the podcast, Heart Rate Variability or HRV. We covered an introduction to the importance of understanding HRV back in April of 2021 on EPISODE #125[i] on “What is HRV and Why is it Important for Tracking Health, Recovery and Resilience?” I wanted to go back to this episode and the basics of HRV because it’s such an important number to measure and understand “not just for health and recovery on a regular basis, but (for) resilience.” (Neurohacker.com) Recently, I found myself not being able to explain what it is, or knowing exactly how I can manipulate it for improved results, leading me to take a closer look at what it is, or go back to HRV Basics. What is Heart Rate Variability (HRV) and Why is it Considered “the Most Important Biomarker--a measure that captures what’s going on in a cell at any given moment that can serve as an early warning system for your health?”[ii] Unless you have been training with a forward-thinking coach, you’re an elite athlete, or someone who has taken a serious interest in measuring their performance, most of us have not heard of, or really understand what exactly heart rate variability means. From the name, we can tell it has something to do with our heart rate. Maybe you’re like me and you measure your own HRV and have even studied it to see what exactly it is, but when it comes to explaining it to someone else, you just say when asked what it is “that it’s just an important number to know.”  When I heard that Dr. Rabin, a board-certified psychiatrist and neuroscientist, would consider HRV to be “the most important biomarker for tracking health” I knew it was time to revisit HRV closely so that I could better understand it myself, and explain it to others with more confidence. I wondered: What is HRV again? Why is it the most important biomarker for tracking health, recovery and resilience? What tools can I use to measure it? Besides clean eating, sleep and rest, how else can I improve this important number? Can I dive deeper and look at my HRV, and see if I can manipulate a higher score by doing things a certain way when I’m experiencing high stress or having an off day? How can I stay motivated when life is difficult to keep pushing forward and have more high HRV days than low? REMINDER: WHAT IS HRV? After reviewing EPISODE 125, where we covered “What is HRV and Why is it Important?”  I remembered that this number measures a person’s ability to bounce back from stress. Kristen Holmes and Emily Capodilupo from Whoop are HRV experts and they remind us on their most recent review of HRV that “it’s the timing between the beats of your heart and that the variability comes from the sympathetic side (where we take action) and the parasympathetic side (where we rest or digest).”[iii] BALANCING OUR PARASYMPATHETIC AND SYMPATHETIC NERVOUS SYSTEM: Our goal is to find balance between the two parts of our autonomic nervous system. When there’s balance, we will see a lot of variability, or a HIGH HRV that tells us that our nervous system is balanced and that “you have a lot of resources that are available and ready to use.” (Kristen Holmes/Emily Capodilupo, Whoop’s HRV 101 Podcast).  This is why more and more athletes are using wearable devices like Whoop, or there’s