One quick thing before we dive in: heart rate zones are for cardio. Cardio means exercise that involves doing the same rhythmic movement over and over, like running or swimming or stair climbing.

Your resting heart rate is an important indicator of overall health, but what is considered "normal"? Our experts explore normal heart rate ranges by age.

AR swimming wearable will work with Polar's OH1+ sensor. Polar is teaming up with startup Form to let you view heart rate data through its swimming goggles with a built-in AR display.

FORM Swim is now able to pair with Polar optical heart rate sensors to track your pulse while you're swimming and then analyzes the data after your workout.

The Garmin Swim 2 features up to 7 days of battery life in smartwatch mode, up to 13 hours in GPS and optical heart rate (OHR) mode and up to 72 hours in pool and OHR mode.

Polar has unveiled the follow-up to its OH1 heart rate monitor armband, which will monitor your heart in the water as well as on land. The OH1+ takes the form of the same small, disc-shaped device ...

You might have thought Form already perfected the Swim Goggles, but the company is about to add another welcomed feature: heart rate tracking. Today, Form announced that it's teamed up with the ...