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health advisory Hospital Doctor Yu 2007-11-8 19:07:57

Answers:

Because when you are distracted, you will breath involuntarily. We can get a more accurate breathing ratio when you are breathing involuntarily.

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if you tell that you check the breathing a person will concentrate on it. By distraction the person you will get the attantion away from breathing it self.

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breathing can be voulntry and invoulntry, i.e u can breath by yourself intentionally or if u forget it will happen normally (like the heart beats invoulntry - u dont have to do it). so when u ditract someone the brain will shift the breathing to the invoulntry state where the measurment will be more accurate (not made up)

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