A MECHATRONIC TOOL FOR REVEALING INVERSE RELATIONSHIPS AMONG HEART’S STROKE VOLUME AND HEAD’S LINEAR ACCELERATION INDUCED BY MOORED BOATS ROLLING IN ELDERLY SAILORS WITH UNCHANGED BODY SIZES: A NON-DRUG ANTI-HYPERTENSIVE ADVANTAGE?

Filippo Tocco^{1, 9}, Roberto Solinas¹, Fernanda Velluzzi¹, Myosotis Massidda¹, Damiano Valerio Mattana¹, Andrea Fois², Laura Melis², Andrea Manuello Bertetto³*, Elvio Bonisoli³†, Simone Venturini³, Pietro Bianco³, Antonio Hector Dell’Osa⁴, Ana Fátima Pereira⁵, Salvatore Melis^{6, 9}, Angelo Cerina⁷, Lorenzo Loviselli⁸, Ricardo Marcello⁸, Alberto Concu^{8, 9}*

¹ Department of Medical Sciences and Public Health and University Hospital, University of Cagliari, Italy
² Remote Biosignals Acquisition Unit, Nomadyca Ltd, Mulago Hospital, Kampala, Uganda
³ Department of Mechanical and Aerospace Engineering, Politecnico di Torino, Turin, Italy
⁴ Lab Electrónica Aplicada y Biomedicina, Universidad Nacional de Tierra del Fuego, Ushuaia, Argentina
⁵ Polytechnic Institute of Setubal, School of Education, Life Quality Research Centre, Rio Maior, Portugal
⁶ Sardinia’s Schools Direction Office, Physical and Sports Education Unit, Ministry of Education and Merit, Cagliari, Italy
⁷ Acquaforte Thalasso & Spa Medical Team, Forte Village Resort, Santa Margherita di Pula, Cagliari, Italy
⁸ Lab of Wearable Devices Manufacturing, AC Technologies Ltd, Cagliari, Italy
⁹ Lab-Campus for Sciences and Techniques of Physical Exercise, Sport and Preventive Motion Skills, Sardegna Ricerche, Agency for Research &Technological Development, Cagliari, Italy
* Corresponding author: aconcu44@gmail.com, andrea.manuello@polito.it

ABSTRACT: Three aged and skilled sailors, being in a good condition of cardio metabolic compensation, took a seven days coastal sailing cruise. They daily underwent a cardiodynamic assessment by a impedance cardigraphy tool while staying seated on the moored boat. They showed a statistically significant inverse linear regression of beat-to-beat left ventricular stroke volume (LSV) versus the component of the head acceleration along the spatial X-axis, positioning the subject’s head so that the X-axis lay along the nose-ocipital direction. In fact, the temporally corresponding values of LSV inversely changed of about 11 ml on average, with an interindividual difference ranging from a minimum of about 6 ml to a maximum of about 14 ml, for each unitary head acceleration change. Since the reduction of left ventricular stroke volume may be due to the already observed vestibulo-sympathetic reflex from which limbs muscle vasodilation may occur, and considering that LSV falling induces a reduction in arterial blood pressure, it is hypothesized that the slow rolling of moored boat might also act as a noninvasive arterial blood pressure attenuator effect.

KEYWORDS: holder sailors, moored boat’s rolling, head linear acceleration, cardiodynamic assessment, leg vessels sympathetic control

DOI: https://doi.org/10.69076/jomac.2024.0018

CITATION: F. Tocco, R. Solinas, F. Velluzzi, M. Massidda, D. V. Mattana, A. Fois, L. Melis, A. Manuello Bertetto, E. Bonisoli, S. Venturini, P. Bianco, A. H. Dell’Osa, A. F. Pereira, S. Melis, A. Cerina, L. Loviselli, R. Marcello and A. Concu, A MECHATRONIC TOOL FOR REVEALING INVERSE RELATIONSHIPS AMONG HEART’S STROKE VOLUME AND HEAD’S LINEAR ACCELERATION INDUCED BY MOORED BOATS ROLLING IN ELDERLY SAILORS WITH UNCHANGED BODY SIZES: A NON-DRUG ANTI-HYPERTENSIVE ADVANTAGE?, International Journal of Mechanics and Control, Vol. 25, No. 01, pp. 133-142, 2024, https://doi.org/10.69076/jomac.2024.0018

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