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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. Pulse watch - Wikipedia

   en.wikipedia.org/wiki/Pulse_Watch

   A typical pulse watch device will use photoplethysmography (PPG), this methodology uses light and optical detectors to measure heart rate. Light emitting diodes (LEDs) and photodiodes, which are sensitive to light, measuring changes in light absorption in the body.

4. Cardiac monitoring - Wikipedia

   en.wikipedia.org/wiki/Cardiac_monitoring

   The new wearable heart rate monitors indirectly measure the heart rate with reflectance photoplethysmography. The monitor illuminates the skin tissue with light emitting diode (LED) and detects the intensity of light reflected with the photodetector. [11] Wearable optical heart rate monitors are less reliable than electrode-based heart rate ...

5. Heart rate - Wikipedia

   en.wikipedia.org/wiki/Heart_rate

   A medical monitoring device displaying a normal human heart rate. Heart rate is the frequency of the heartbeat measured by the number of contractions of the heart per minute (beats per minute, or bpm). The heart rate varies according to the body's physical needs, including the need to absorb oxygen and excrete carbon dioxide.

6. Holter monitor - Wikipedia

   en.wikipedia.org/wiki/Holter_monitor

   Other factors can also affect signal quality, such as muscle tremors, sampling rate and resolution of the digitized signal (high quality devices offer higher sampling frequency). The automatic analysis commonly provides the physician with information about heart beat morphology, beat interval measurement, heart rate variability , rhythm ...

7. Oura’s plans to ensure consumers keep a ring on it - AOL

   www.aol.com/finance/oura-plans-ensure-consumers...

   I think about Fitbit and all of these other many, many devices that can measure things. ... you would lower your resting heart rate, you would reduce your body fat, and then your overall mortality ...