[1F4] Differential digital photoplethysmographic analysis of microvascular responses induced by arm position changes in female swimmers

「Purpose」 : Digital photoplethysmography (DPG) is a simple method of analyzing peripheral hemodynamic in clinical medicine and psychology. We have performed studies on the basis of differential digitalphotoplethysmography (ΔDPG) with only slight baseline fluctuations and its application to exercise physiology. The purpose of this study was to perform ΔDPG measurements and observe changes in microvascular responses to positional loading. 「Methods」 : The subjects were 6 female swimmers with a mean swimming history 11 years and 6 adult female controls. Analysis by positional loading was initially performed. Followed by that by image loading. In the sitting position at rest, DPG, ΔDPG, respiratory curve recording, electrocardiography, and measurement using a Finapress were simultaneously performed. 「Results」 : In positional loading, ΔDPG showed dilation while the arms were being raised above the heart and contraction waves while the arms were being lowered and significantly slighter changes in dilation contraction responses in the swimmers than in the controls (p