Yes: The machine isn't smart enough to figure out that you are intentionally changing your heart rate by breathing in and out deeply. The more expensive, smarter machines have special software to handle the normal variations in heart rate when a person breathes in and out (the variations are quite noticeable in children).
Answered 5/27/2013
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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