View attachment 2134277Highly recommend everyone track and try to increase their heart rate variability. It is directly related to the ability of the brain and heart to handle stress and is a biomarker for autonomic nervous system function. I started working on mine in May and I really feel 3x better and more resilient day to day. The Apple Watch has been tracking this in the background for as long as you have been wearing it. You can take in the moment HRV measures (which is very similar to what this study did) by using the breath app and then checking the health app.
This is one of the most important health metrics it tracks. Another good one related to mental and physical health is “cardio fitness” which is tracked every time you log a walking or running workout. This is a direct measure of how much blood your heart can get to your brain.