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Timex Group's Sequel division houses the Guess collections and had grown tremendously to rival Timex as the firm's top earner, but the signature brand had been flat as of August 2008. [40] Since this change, Timex has introduced GPS enabled watches, heart rate monitor exercise watches, and similar devices.
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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).
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.
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 ...
The ILR monitors the electrical activity of the heart, continuously storing information in its circular memory (hence the name "loop" recorder) as electrocardiograms (ECGs). Abnormal electrical activity - arrhythmia is recorded by "freezing" a segment of the memory for later review.
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