Updated: Oct 9, 2018
For the last month I have been tracking and reducing stress with a device called Inner balance Sensor from Heart Math.The device cost $189, and is designed to help coach you to identify when your body switches into fight/flight mode, and to then help train you to get back into a parasympathetic mode.
The rhythm of your heart changes with every single beat. The variability between beats is a good indicator of your overall wellness and adaptability. A heart rate with less variability between beats suggests that the person is older, or suffering declining health.