Everything you need to know about photoplethysmography (PPG), the technology behind heart rate measurements in fitness ...

The UltraHuman Ring Air comes with a charger and cable in the box, though there's no AC brick. Sliding the ring onto the ...

In 2025, fitness trackers have become more sophisticated, offering advanced health insights, seamless connectivity, and ...

“Fitness trackers offer a ton of benefits—they can monitor your heart rate, track your workouts, count your steps, analyze ...

Check out our favorite fitness trackers that you can buy in 2025, including popular picks from Fitbit, Whoop, Oura Ring, and ...

Here’s how it works. The best fitness trackers you can buy today range in price from just under $50 to several hundred dollars. For 2025, we've rounded up and tested every popular model out ...

Whether you want to count steps, track your sleep or boost your running performance, these are the best fitness trackers to buy on a tight budget. When you purchase through links on our site ...

Measured in milliseconds, a normal HRV for adults can range from below 20 to above 200, depending age, gender, and other ...

The Xiaomi Smart Band 9 delivers a decent balance of features and functionality VS cost and versatility. It's a fitness ...

Garmin's Forerunner 55 smartwatch normally retails for $199.99. As of March 10, it's on sale for $160.99 at Best Buy.

With their ability to do everything from count steps and monitor heart rate to track sleep and tally calories, it’s little ...

Discover the best Fitbit smartwatches for tracking your health and fitness with upgraded heart rate, sleep tracking, GPS, and ...