Logo do repositório

Percorrer por autor "Barbosa, T."

A mostrar 1 - 2 de 2
  • The interaction between intra-stride variation of the velocity and mean race walking velocity
    Publication . Morouço, P.G.; Barbosa, T.
    Introduction The intra-stride/cycle variation of body velocity (dv) is considered as an estimator of the energy cost of locomo-tion or efficiency in some forms of human locomotion, including waking, running, trotting and swimming (1, 2). Previous studies reported nonlinear relationships between dv and velocity (v) for land and aquatic locomotion tech-niques (2,3). The aim of this study was to examine possible relationships between the dv and the v in race walking.
    2014-06-01Comunicação em conferência Acesso aberto Ver mais
  • The Interaction Between Intra-Cyclic Variation of the Velocity and Mean Swimming Velocity in Young Competitive Swimmers
    Publication . 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.
    2012-09-12Artigo científico Acesso restrito Ver mais