Wearables measure several aspects of health, and heart rate variability might be one of those. It may be surprising when your device informs you that your heart rate variability is high or low, but ...

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.

The importance of glycaemic control, as reflected by average A1c levels, is well-established in diabetes management guidelines; however, growing evidence suggests that A1c variability may also be ...