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Shobo A1,2, Kishi H3
1Bunkyo Gakuin University, Department of Health Scirnce Technology, Fujimino, Japan, 2Bunkyo Gakuin University Graduate School, Graduate School, The School of Health Care Science, Bunnkyoku, Japan, 3Polytechnic University, Department of Electronic and Information Systems Engineering, Kodaira, Japan
Background: The circulatory regulating mechanism includes the cardiac, muscular and respiratory pumps. Individuals with a kyphotic posture are known to have a decrease in respiratory function. The relationship amongst sitting position, hæmodynamics and respiratory pump function remains to be clarified.
Purpose: To investigate changes in hæmodynamics in relation to respiratory pump function in two sitting positions.
Methods: The participants were 23 sedentary healthy men with a mean age of 21.0 years, mean body mass of 62.5kg, mean height of 171.1cm and a body mass index of 21.3kg/m2. Using impedance cardiography, changes in the body's hæmodynamics were measured during quiet and deep breathing in two sitting positions: a) upright with a pelvic tilt of zero degrees; and b) hunchbacked with a pelvic tilt of 20 degrees. Measurement parameters were as follows: heart rate (HR), systolic blood pressure (sBP), diastolic blood pressure (dBP), stroke volume (SV), cardiac output (CO) and total peripheral resistance (TPR).
Results: In hunchbacked sitting during deep breathing, HR and CO were found to increase significantly compared to those for quiet breathing, but TPR decreased significantly. Effect of hunchbacked and upright sitting on deep breathing produced a significant decrease in HR and CO, but, in the former, there was a significant increase in SV compared with that in the latter.
Conclusion(s): In sedentary healthy young men in hunchbacked sitting, the effect of respiratory pump function may be greater yielding an increase in CO.
Implications: Clarification of hæmodynamic responses resulting from respiratory pump function will be useful for clinical application in cardiopulmonary physiotherapy.
Keywords: Respiratory pump function, sitting position, hæmodynamics
Funding acknowledgements: Funding was provided by Bunkyo Gakuin University University Research Institute Collaborative Research Grant.
Purpose: To investigate changes in hæmodynamics in relation to respiratory pump function in two sitting positions.
Methods: The participants were 23 sedentary healthy men with a mean age of 21.0 years, mean body mass of 62.5kg, mean height of 171.1cm and a body mass index of 21.3kg/m2. Using impedance cardiography, changes in the body's hæmodynamics were measured during quiet and deep breathing in two sitting positions: a) upright with a pelvic tilt of zero degrees; and b) hunchbacked with a pelvic tilt of 20 degrees. Measurement parameters were as follows: heart rate (HR), systolic blood pressure (sBP), diastolic blood pressure (dBP), stroke volume (SV), cardiac output (CO) and total peripheral resistance (TPR).
Results: In hunchbacked sitting during deep breathing, HR and CO were found to increase significantly compared to those for quiet breathing, but TPR decreased significantly. Effect of hunchbacked and upright sitting on deep breathing produced a significant decrease in HR and CO, but, in the former, there was a significant increase in SV compared with that in the latter.
Conclusion(s): In sedentary healthy young men in hunchbacked sitting, the effect of respiratory pump function may be greater yielding an increase in CO.
Implications: Clarification of hæmodynamic responses resulting from respiratory pump function will be useful for clinical application in cardiopulmonary physiotherapy.
Keywords: Respiratory pump function, sitting position, hæmodynamics
Funding acknowledgements: Funding was provided by Bunkyo Gakuin University University Research Institute Collaborative Research Grant.
Topic: Cardiorespiratory
Ethics approval required: Yes
Institution: the Bunkyo Gakuin University
Ethics committee: the Bunkyo Gakuin University Ethics Committee
Ethics number: Approval No. 2017-0024
All authors, affiliations and abstracts have been published as submitted.
