The Physiology of Consistency: Why Stable Sleep and HRV Predict Health and Performance, with Dr Greg Grosicki & Prof Paul Laursen

What can heart rate variability actually tell us about training, recovery, and long term health, and where do most people still get it wrong?

In this episode, Dr Greg Grosicki joins us to unpack the science and practical value of HRV, from what it really measures to why context matters so much when interpreting it. We explore how exercise intensity, sleep, alcohol, sickness, hydration, and metabolic health can all shape HRV, and why a single daily score often tells only part of the story.

We also dive into Greg’s new work on HRV CV, a promising way to understand the stability of recovery over time, and discuss how wearables at scale are changing the kinds of questions sports science can answer.

Today’s speakers:

Prof Paul Laursen  https://www.paullaursen.com/
Dr Greg Grosicki https://www.linkedin.com/in/gregorygrosicki/

Greg’s new paper: https://journals.physiology.org/doi/full/10.1152/ajpheart.00738.2025?rfr_dat=cr_pub++0pubmed&url_ver=Z39.88-2003&rfr_id=ori%3Arid%3Acrossref.org