Heart Rate Monitors are popular among recreational athletes, and - TopicsExpress



          

Heart Rate Monitors are popular among recreational athletes, and the strap around the chest is a common sight. Consider how far technology has developed when you look at this image of an early commercial electrocardiogram machine, built in 1911 by the Cambridge Scientific Instrument Company to measure the heart’s activity! Does a heart rate monitor help you track your training efforts? Source: en.wikipedia.org/wiki/Electrocardiography#mediaviewer/File:Willem_Einthoven_ECG.jpg
Posted on: Thu, 02 Oct 2014 07:05:09 +0000

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