Micro-fluctuations in the time between heartbeats are proving a helpful indicator of mental health, stress levels and exercise capacity. They could even provide insight into how well you are ageing.

With a Whoop health tracker strapped to my wrist for the past year, I’ve had an unusually detailed window into my biology – sleep, blood oxygen, steps and, most intriguingly, heart rate variability, ...

Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...

A proliferation of data from wearable technology is telling people how to optimize their job performance. Is that a good thing? BEN VOLDMANCredit... Supported by By Noam Scheiber Dr. Ravi Solanki ...

Current global climate models (GCMs) support with high confidence the view that rising greenhouse gases and other anthropogenic forcings account for nearly all observed global surface warming—slightly ...

Heart rate variability (HRV), the variation in intervals between consecutive heartbeats, reflects autonomic nervous system function and has been studied as a potential biomarker in cardiovascular ...

Fitness trackers and smart watches are widely popular wearable devices that measure several types of health metrics, including step count, calories burned, sleep quality, Vo2 max and heart rate. As a ...

Did you know there’s a number that might let you know how stressed you are, whether you have a cold coming on and how to get into the zone if you’re about to present at a big meeting? You can find ...

You might be familiar with HRV—heart rate variability—as a popular training tool for workouts and a biomarker for measuring exercise recovery. Beyond exercise tracking, heart rate variability has a ...

Heart rate variability (HRV) is the variation in the time between two consecutive heartbeats over a specific period. Doctors may use HRV as an indicator for certain aspects of a person’s health, ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. COVID-19 vaccination has been the subject of immense scrutiny and ...