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2. 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).

3. Polar coordinate system - Wikipedia

   en.wikipedia.org/wiki/Polar_coordinate_system

   Similarly, any polar coordinate is identical to the coordinate with the negative radial component and the opposite direction (adding 180° to the polar angle). Therefore, the same point ( r , φ ) can be expressed with an infinite number of different polar coordinates ( r , φ + n × 360°) and (− r , φ + 180° + n × 360°) = (− r , φ ...

4. List of Wear OS devices - Wikipedia

   en.wikipedia.org/wiki/List_of_Wear_OS_devices

   PPG (Heart rate monitor) Watch Urbane (W150) 2015-04-27 Android Wear 2.23 Qualcomm Snapdragon 400 512 MB No 410 mAh IP67 PPG (Heart rate monitor) Watch Urbane 2nd Edition (W200V) 2016-03 Android Wear 2.15 Qualcomm Snapdragon 400 768 MB Yes 570 mAh Round, 1.38 in (35 mm) [32] Watch Style (W270) 2017-02-09 Wear OS 2.27 Android 8.0.0

5. The 11 Best Running Watches for Every Type of Runner ... - AOL

   www.aol.com/lifestyle/11-best-running-watches...

   1. Timex Ironman R300. Best Overall. Value: 20/20 Functionality: 20/20 Ease of Use: 19/20 Aesthetics: 16/20 Run Harmony: 20/20 TOTAL: 95/100 The Timex Ironman R300 was a surprising hit for me and ...

6. Pulse watch - Wikipedia

   en.wikipedia.org/wiki/Pulse_Watch

   There are also devices which use similar technologies to monitor heart rate from the ear, forearm and chest, using a chest strap. [2] All of which still use similar mechanisms to provide unobstructed biometric data for individuals. One study compared the use of a pulse watch device and a forearm device in detecting heart rate during physical ...

7. Fitness tracker - Wikipedia

   en.wikipedia.org/wiki/Fitness_tracker

   Wearable heart rate monitors for athletes were available in 1981. [4] Improvements in technology in the late 20th and early 21st century made it possible to automate the recording of fitness activities, as well as to integrate monitors into more easily worn equipment. The RS-Computer shoe was released in 1986.