Percorrer por autor "Marinho, D."
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- Associations between partial times and total time in 50 m front crawl, according to agePublication . Dias, Pedro; Amaro, Nuno; Marques, M.C.; Marinho, D.; Morouço, Pedro
- Differences in swimming force metrics induced by genderPublication . Amaro, Nuno; Marinho, D.; Batalha, N.; Morouço, Pedro
- Non-Newtonian Blood Flow in Portal Vein with Thrombosis: A Study by Computational Fluid DynamicsPublication . Soares, A. A.; Gonzaga, S.; Silva, José Silvestre; Marinho, D.; Silva, A.; Rouboa, AbelWe investigate the effects on non‐Newtonian blood flow model on the wall shear stress (wss), velocity and viscosity distributions. The 3D Navier‐Stokes equations coupled with viscosity models describing the steady flow in Portal Vein have been solved numerically. Three blood viscosity models (Newtonian, Power‐law and Carreau) are used in numerical simulations. The results highlight the influence of these models on the blood flow and show that the viscosity model of blood may have significant impact on the numerical results especially in the region of the thrombosis.
- Relationship between power decrease and swimming performance : a pilot studyPublication . Dias, Pedro; Costa, Aldo M.; Morouço, Pedro; Garrido, N.; Amaro, Nuno; Marinho, D.; Marques, M.C.
- Relationship of force metrics with swimming performance in age-group swimmersPublication . Amaro, Nuno; Marinho, D.; Batalha, N.; Morouço, Pedro
- The Interaction Between Intra-Cyclic Variation of the Velocity and Mean Swimming Velocity in Young Competitive SwimmersPublication . Barbosa, T.; Morouço, Pedro G.; Jesus, S.; Feitosa, W.; Costa, M.; Marinho, D.; Silva, A.; Garrido, N.The aim of this study was to assess the relationship between the intra-cyclic variation of the horizontal velocity (dv) and the velocity of the 4 competitive swimming techniques in young swimmers. 45 young swimmers performed a set of maximal 4 × 25 m (freestyle, backstroke, breaststroke and butterfl y stroke) swims with in water start. A speed-meter cable was attached to the swimmer’s hip. The dv and the swimming velocity were analyzed. Within-subject tests presented signifi cant variations in the dv based on the swimming technique. Post-hoc test revealed signifi cant diff erences across all pairwised swimming techniques (P < 0.001), except for the comparison between freestyle and backstroke (P = 0.98). The dv was higher in the breaststroke, followed by the butterfl y, the backstroke and the freestyle. The quadratic models had the best goodness-of-fi t and the lower error of estimation for the relationship between the dv and the swimming velocity in all swimming techniques (0.24 ≤ R 2 ≤ 0.51). As a conclusion, there is a non-linear relationship where the increase of swimming velocity leads to a decrease of dv in young competitive swimmers.