| 초록 |
When a physiological sensing belt imbedded with PVDF film(PSB) is worn around the chest, we have already reported that respiration rate can be simply monitored through measuring piezoelectric current generated by repeated stretching-contraction of PVDF film during breathing in voltage mode and counting the number of maximum peaks for a desired time. In this study we found that the peak intensity is increased and the peak interval is becoming shorter with the increasing exercise intensity and time. Thus integration values of rectified respiration-related piezoelectric signals as a function of time are proportional to VO2 and VCO2 from which energy expenditure can be calculated during exercising. So with appropriate calibration of integrated values using VO2 and VCO2, we could evaluate energy expenditure by simply wearing a PSB around the chest during walking, running, exercising, etc. Acknowledgement: This work was supported by the NRF(R11-2005-065) and the MKE(Grant No. 10033449). |
