Oura reports that heart rate variability (HRV) measures the variation in heartbeat timing, reflecting stress levels and recovery. Higher HRV indicates well-being, while lower HRV signals stress.

Most patients (56%) had low A1c variability (0%-0.49% per quarter), and about one third had moderate variability (0.5%-1%). The lowest risk for the outcomes of MI ...

Your heart beats around 100,000 times every day. Heart rate is a key marker of cardiovascular activity and an important vital sign. But your pulse is not as steady as a precision clock – nor would you ...

One of the most pervasive misunderstandings of climate — even among some who publish on climate — is the belief that any long-term trend in a measured climate variable indicates a change in climate, ...

https://urldefense.proofpoint.com/v1/url?u=http://adsabs.harvard.edu/abs/2014ApJ...784...92M&k=di ZKtJPqj4jWksRIF4bjkw%3D%3D%0A&r ...

Part two of this three-part series reveals control technology concepts to reduce process variability and increase profitability ...