[Wolf] had a Polar brand exercise watch that ... ditched the watch and built an Arduino-based heart rate monitor. He’s still using the chest strap and was happy to find that SparkFun sells ...

Pretty much every fitness tracker and smartwatch has an optical heart rate sensor, but they're not always perfectly accurate.

When exercising he wears a Polar heart rate monitor which sends data from a chest strap to his wristwatch. But his exercise bike also has a heart rate readout that depends on your hands touching ...

The Polar OH1 should be at the top of your list if you want an armband heart rate monitor rather than a chest strap. Scosche's Rhythm24 is an armband heart rate monitor you can use during almost ...

Polar USA heart monitors allow athletes of all ability levels to keep track of their pulse rate during exercise. Two-piece Polar heart monitoring systems consist of a sensor strap that fits around ...

Through controlled breathing it is possible to regulate your body's stress reponse. This application allows you to measure and train this effect with a Polar H10 Heart Rate monitor. Heart rate ...

And for those who want it all, there's a bundle that includes a Polar H10 heart rate sensor—because what's conquering the outdoors without monitoring your heart rate every step of the way?