How are Heart Rate Variability (HRV) and Blood Pressure (BP) related?
Baroreceptors, which are the body’s natural blood pressure sensors located in the aortic arch and internal carotid arteries, contribute to Heart Rate Variability. When you inhale, heart rate increases. Blood pressure rises about 5 seconds later. Baroreceptors detect this rise and fire more rapidly. When you exhale, heart rate decreases. Blood pressure falls about 5 seconds later. (Gevirtz & Lehrer, 2003; Lehrer & Vaschillo, 2008).
For a more in-depth look at the science and mechanisms behind blood pressure and Heart Rate Variability, visit the Foundations of Heart Rate Variability course (link).