Milliseconds of variability, now detected by fitness watches, can improve well-being Earlier this year I got an Oura ring to ...

When it comes to exercising, your heart rate is the gold-standard metric to uncover how hard you're pushing. It tells you whether you're working aerobically or anaerobically, how your body is reacting ...

Sure, they're fun to check—but a cardiologist who owns every major fitness watch explains which numbers are more distracting ...

Designed by Nova Radio Labs in the US, the Novaduino Environmental Sensor Kit is an Arduino-programmable air quality and ...

It's healthy to know your numbers. Learn about resting and maximum heart rates, exercise targets, and when to consult a ...

When recording your heartbeat, look out for skipped beats, extra beats, or long pauses between beats, that can feel like ...

Training smart means mixing up the intensity of your runs – not just going out all-guns blazing on every effort. But distance, time and pace are all blunt tools for measuring effort, which is where ...

Just about every “getting started with microcontrollers” kit, Arduino or otherwise, includes an ultrasonic distance sensor ...

I’ve been working with computers for ages, starting with a multi-year stint in purchasing for a major IBM reseller in New York City before eventually landing at PCMag (back when it was still in print ...