Influence of sprint exercise on aortic pulse wave velocity and femoral artery shear patterns
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ORIGINAL ARTICLE
Influence of sprint exercise on aortic pulse wave velocity and femoral artery shear patterns Jacob P. DeBlois1 · Wesley K. Lefferts1,2 · Kevin S. Heffernan1 Received: 7 April 2020 / Accepted: 25 August 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Purpose Aortic stiffness may affect shear patterns in the peripheral vasculature. This study examined if sprint exercise, which typically increases aortic stiffness is associated with increased peripheral retrograde blood flow and impaired microvascular function. Methods Twenty participants (10 women; age: 27 ± 5 years) underwent arterial stiffness, shear rate, and microvascular function assessment at three time points: baseline; following time control; ~ 2 min post a 30-s cycle ergometer sprint against 7.0% body mass. Aortic stiffness was assessed using carotid-femoral pulse wave velocity (cfPWV). Superficial femoral artery (SFA) diameter and blood velocity were assessed using Doppler-ultrasound and were used to calculate shear rates and resistance index (RI). SFA wave reflections were obtained via wave intensity analysis. Vastus medialis microvascular function was measured as tissue saturation index reactivity pre-post exercise via near-infrared spectroscopy. Results cfPWV increased by + 0.8 ± 0.7 m·s−1 following exercise (p
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