As stress levels rise globally, wearable health devices are evolving from simple fitness trackers to intelligent stress-monitoring tools. From analyzing heart-rate variability (HRV) to measuring micro-movements and skin conductivity, the new generation of stress-tracking technology aims to help people understand and manage their mental well-being in real time. But...

Sleep is often measured by how many hours a person spends in bed, but duration is only part of the picture. Sleep quality also matters. A person can spend plenty of time in bed and still wake up feeling tired if their sleep is frequently interrupted or does not provide...