Why the study?
Does incorrect delay time between gas concentration and flow signals cause errors in breath-by-breath measurement of VO2 during exercise?
Does incorrect delay time between gas concentration and flow signals cause errors in breath-by-breath measurement of VO2 during exercise?
Incorrect delay time settings in breath-by-breath VO2 measurement systems cause significant errors, especially at high breathing frequencies, suggesting calibration should be performed at high breathing rates.
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Delay miscalibration risks large VO2 errors at high respiratory rates; leaves open standardized high-frequency validation for breath-by-breath systems.
Proctor et al. (1996) studied this question.