Abstract
The interaction between ventricular ejection and body movement during running in humans causes blood pressure to be modulated with a frequency equal to the difference between heart rate and step rate (1). The beating effect may be due to the transmission of ground impact forces through the blood column (mainly the aortic trunk) and the changc in cardiac ejection due to altered venous return. However, when heart rate and step rate are equal, the beating effect vanishes and pulse pressure is maximal when cardiac ejection and foot strike are in phase, and minimal when out of phase (1,2). It is not known if this occurs spontaneously with inherent control such that blood pressure is optimised to cause minimal cardiovascular energy expenditure. However, the physical characteristics of humans indicate that, in endurance running (eg marathon), values of heart rate and step rate are quite close, raising the possibility of a type of coupling or entrainment arising from a resonance between the action of the heart and the vertical movement of the body.
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© 1999 Springer Science+Business Media Dordrecht
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Qasem, A., Avolio, A., Camacho, F., Stephan, T., Frangakis, G. (1999). A New Technique for Non-Invasive Assessment of Aortic Pressure Modulations during Treadmill Running. In: Tzafestas, S.G. (eds) Advances in Intelligent Systems. International Series on Microprocessor-Based and Intelligent Systems Engineering, vol 21. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-4840-5_41
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DOI: https://doi.org/10.1007/978-94-011-4840-5_41
Publisher Name: Springer, Dordrecht
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