Your heart rate variability (HRV) score shows the variability between heartbeats. This helps measure how well your heart responds to stimuli like stress and physical activity. There are several ways ...

Heart rate variability (HRV) measures the fluctuations in time between heartbeats. While it isn’t a health metric you need to overthink, HRV is an indicator of how well the body can adapt to and ...

Imagine if your Apple Watch could tell you which days were best for you to do a workout, and what kind of workout you should do. Well it can, sort of, thanks to a hidden feature that few people have ...