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Computer Evaluation of Exercised Based on Blood Volume Pulse (BVP) Waveform Changes

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Abstract:
 
"Computer Evaluation of Exercised Based on Blood Volume Pulse (BVP) Waveform Changes", (2004)
Armando Barreto, Chao Li and Jing Zhai

ABSTRACT: It is well established that the benefits obtained from exercising are enhanced if a sufficiently strong cardiovascular response is achieved as result of the exercise sessions. Frequently, the achievement of that critical exercise level is gauged by estimation of the subject's heart rate and comparison to an appropriate "target rate". This paper explores the use of computerized algorithms to assess the changes in the Blood Volume Pulse (BVP) waveform recorded using an infrared finger photoplethysmograph (PPG) at different points in an exercise session, as an alternative (and more comprehensive) evaluation of the cardiovascular response due to physical exercise. The paper focuses on the quantification of a feature of the BVP waveform called the "Dicrotic Notch", which has been observed to reduce its depth as exercise progresses. This paper reports on the comparison of three computerized approaches designed to reflect the BVP waveform changes through a single parameter, which could be obtained automatically from the digitized BVP signal.