Researchers hope a pilot project that monitors the heart rate of baby seals will help them understand how the pups prepare ...

Those devices were an Apple Watch Series 10, a Fitbit Charge 6, a Garmin Forerunner 265S, an Oura Ring 4, and a Whoop 4.0.

On Sable Island, a pilot program is giving marine scientists from WHOI and partners a rare window into the lives of gray seal ...

Best heart rate monitor watches to keep an eye on your ticker - Smartwatches that monitor your heart rate can be essential ...

The Fitbit Sense 2 is a smartwatch compatible with iOS and Android and includes real-time heart rate monitor, steps, sleep and calories. It has a touchscreen display with 336 x 336 screen resolution.

How resistant the watch is to submersion in water, as tested by subjecting the device to a water pressure equivalent to the depth the manufacturer claims the fitness tracker can withstand.

SAVE $44: As of Feb. 17, the Fitbit Charge 6 is on sale for $115.95 at Amazon. That's 28% off its list price of $159.95.

The best fitness trackers out there will give you data for your heart rate, calories, exercise, sleep, and even stress levels. Our experts review our picks, putting them through their paces to ...