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.

There are several markers for how well we are aging. Resting heart rate has become an important indicator of longevity.

You can track this with your smartwatch or by using the pulse tracker on some gym machines, though you can do it the ...

'Stand with Putin or with peace': Zelensky committed to ending war despite what Trump says ...