A heart rate monitor watch looks like a common digital wristwatch, but the only difference is that it shows the speed of your own heart.
The purpose of heart rate wrist watches is to monitor the heart just by wearing a sleek watch over the wrist. Some of these are accompanied by a chest strap (which holds the transmitter on the chest).
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And some of them are strapless and they are mostly used by the athletes. In some cases, the watch heart rate monitors without the chest strap, one just needs to touch the sensors found in the watch for a couple seconds and the heart rate appears on the screen.
The minimum or maximum heart rate can be manually set at the heart rate monitor watch, based on the endurance level. Even audio and visual alarms can be set, so that a person immediately gets to know that they have crossed or reached his maximum heart and thus is "out of zone" and can slow down for some time.
This zone suggests the speed that's perfect, or safe, for your body. To keep the ideal heart rate for your body, one wants to track them while doing any kind of exercise.
The heart rate monitor watch has been at least two groups of individuals: one is athletic types who prefer to fine-tune their racing and training performance, and another is heart-related individuals, who should maintain a constant watch on their own heart.