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  • Title: A comparison of the effects of lower body positive pressure and head-down tilt on cardiovascular responses in humans.
    Author: Fu Q, Sugiyama Y, Kamiya A, Iwase S, Mano T.
    Journal: J Gravit Physiol; 1999 Jul; 6(1):P111-2. PubMed ID: 11542981.
    Abstract:
    Both lower body positive pressure (LBPP) and head-down tilt (HDT) can induce fluid shifts from the lower body to the thorax and result in a loading of cardiopulmonary baroreceptors. The aim of this study was to compare the effects of LBPP and HDT on cardiovascular responses in humans. To accomplish this, a graded LBPP test of 10, 20 and 30 mmHg, as well as a 6 degrees HDT was applied. It has been suggested that <20 mmHg LBPP and <30 degrees HDT load the cardiopulmonary baroreceptors by translocation of blood volume from the lower body to the thorax, while >20 mmHg LBPP activates the intramuscular pressure-sensitive receptors.
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