A heart rate monitor is a personal monitoring device which allows a subject to measure his or her heart rate in real time or record his or her heart rate for later study. It is largely used by performers of various types of physical exercise.
Read more about Heart Rate Monitor: History, Composition
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“Madame Pertelote, my worldes bliss,
Harkneth these blissful birdes how they sing,
And see the freshe flowers how they spring;
Full is mine heart of revel and solace!’
But suddenly him fell a sorrowful case,
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