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2. Apple Watch - Wikipedia

   en.wikipedia.org/wiki/Apple_Watch

   The back of all Apple Watches are equipped with a Heart Rate Monitor, which projects infrared and green light from light-emitting diodes (LEDs) onto the user's skin and photodiodes measure the varying amount of light reflected. Because blood absorbs green light and reflects red light, the amounts of each type of reflected light are compared to ...

3. This popular smartwatch will track your blood pressure — and ...

   www.aol.com/lifestyle/this-popular-smartwatch...

   This is a great Apple Watch alternative with many fancy features like monitors to track calories burned, steps walked, heart rate, and even how well you slept. This popular smartwatch will track ...

4. Pulse watch - Wikipedia

   en.wikipedia.org/wiki/Pulse_Watch

   Wearable technologies that monitor heart rate has interested users for a very long time. [14] In addition to the pulse watch which monitors heart rate from pulse detection at the wrist. There are also devices which use similar technologies to monitor heart rate from the ear, forearm and chest, using a chest strap. [2]

5. Fitness tracker - Wikipedia

   en.wikipedia.org/wiki/Fitness_tracker

   An Apple Watch showing the numbers that track a typical run. A fitbit watch showing conditions for a workout A Garmin watch tracking activity and health data. Many devices primarily intended as smartwatches also function as fitness trackers. An early example was the Apple Watch, which has offered fitness tracker functions since 2014. [15]

6. Withings - Wikipedia

   en.wikipedia.org/wiki/Withings

   Withings has a mobile application that connects with many of its devices and shows activity and sleep trends over time in graphs. The app also tracks weight, heart rate, blood pressure and more if the user enters the data or owns a Withings smart scale or blood pressure monitor. [57] It can be integrated with Apple Watch. [58]

7. Heart rate monitor - Wikipedia

   en.wikipedia.org/wiki/Heart_rate_monitor

   A heart rate monitor (HRM) is a personal monitoring device that allows one to measure/display heart rate in real time or record the heart rate for later study. It is largely used to gather heart rate data while performing various types of physical exercise. Measuring electrical heart information is referred to as electrocardiography (ECG or EKG).