Abstract: We describe an evaluation of photoplethysmography (PPG) signals with two wavelengths channels (infrared and red) using a wrist-worn sensor for the estimation of heart rate variability (HRV) ...

Metal-build smartwatches combine durability with refined design, offering reliable performance, health tracking and a premium ...

Smartwatches can make fitness goals more achievable with activity tracking, health insights and daily reminders that help build consistent habits over time.

I spotted attractive price drops on Amazfit smartwatches that combine fitness tracking, long battery life and smart features, making upgrades far more affordable right now.