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Hydrodynamic profile of young swimmers: changes over a competitive season
Barbosa, Tiago M.; Morais, J.E.; Marques, M.C.; Silva, A.J.; Marinho, D.A.; Kee, Y.H.The aim of this study was to analyze the changes in the hydrodynamic profile of young swimmers over a competitive season and to compare the variations according to a well-designed training periodization. Twenty-five swimmers (13 boys and 12 girls) were evaluated in (a) October (M1); (b) March (M2); and (c) June (M3). Inertial and anthropometrical measures included body mass, swimmer’s added water mass, height, an...
Is the underwater gliding test a valid procedure to estimate the swimmers’ drag?
Morais, J.E.; Costa, M.J.; Jesus, S.; Mejias, J.E.; Moreira, M.; Garrido, N.; Silva, A.J.; Marinho, D.A.; Barbosa, Tiago M.The aim of this study was to develop a structural equation model for underwater gliding distance based on its determinant variables, in order to confirm whether it is an informative test of young swimmers’ hydrodynamic profile. Methods: Twenty-three subjects (twelve boys and eleven girls with a mean age of 13.61 ± 0.83 years old) were evaluated. The following were determined: (i) the underwater gliding distance...
Characterization of speed fluctuation and drag force in young swimmers: a gende...
Barbosa, Tiago M.; Costa, M.J.; Morais, J.E.; Morouço, P.; Moreira, M.; Garrido, N.; Marinho, D.A.; Silva, A.J.The aim of this study was to compare the speed fluctuation and the drag force in young swimmers between genders. Twenty-three young pubertal swimmers (12 boys and 11 girls) volunteered as subjects. Speed fluctuation was measured using a kinematical mechanical method (i.e., speedo-meter) during a maximal 25-m front crawl bout. Active drag, active drag coefficient and power needed to overcome drag were measured w...
A swimmer`s classsification system based in kinematics, anthropometrics and hy...
Barbosa, Tiago M.; Morais, Jorge; Gonçalves, José; Marinho, D.A.; Silva, A.J.The aim of this paper was to identify active drag determinants and classify swimmers based on such features. 67 young swimmers made a maximal 25m Front-Crawl to measure with a speedo-meter the swimming velocity (v), speed-fluctuation (dv) and dv normalized to v (dv/v). Another two 25m bouts with and without a perturbation device were made to estimate active drag coefficient (CDa). Trunk transverse surface area ...
The influence of anthropometric, kinematic and energetic variables and gender o...
Morais, Jorge E.; Garrido, N.; Marques, M.C.; Silva, A.J.; Marinho, D.A.; Barbosa, Tiago M.The aim of this study was to assess the: (i) gender; (ii) performance and; (iii) gender versus performance interactions in young swimmers’ anthropometric, kinematic and energetic variables. One hundred and thirty six young swimmers (62 boys: 12.76 ± 0.72 years old at Tanner stages 1-2 by self-evaluation; and 64 girls: 11.89 ± 0.93 years old at Tanner stages 1-2 by self-evaluation) were evaluated. Performance, a...
Longitudinal study in male swimmers: a hierachical modeling of energetics and b...
Costa, Mário; Bragada, José A.; Marinho, D.A.; Lopes, Vítor P.; Silva, A.J.; Barbosa, Tiago M.The aim of this study was to assess the pooled and individual response of male swimmers over two consecutive years of training and identify the energetic and biomechanical factors that most contributed for the final performance. Nine competitive swimmers (20.0 +/- 3.54 years old; 10.1 +/- 3.41 years of training experience; 1.79 +/- 0.07 m of height; 71.34 +/- 8.78 kg of body mass; 22.35 +/- 2.02 kg.m(-2) of bod...
Tarefas alternativas para o ensino e aperfeiçoamento das partidas e das viragen...
Costa, M.J.; Marinho, D.A.; Silva, A.J.; Queirós, Telma Maria Gonçalves; Barbosa, Tiago M.Quer no contexto educativo quer no contexto competitivo, grande parte do tempo das sessões de natação é despendida no ensino e aperfeiçoamento do momento de nado. No entanto, o contributo da partida e das viragens para o rendimento final também é significativo. Adicionalmente, a aplicação constante das tarefas denominadas “clássicas” tendem a originar constrangimentos que poderão afetar um saudável processo de ...
Modelling propelling force in swimming using numerical simulations
Marinho, D.A.; Barbosa, Tiago M.; Mantha, V.; Rouboa, A.I.; Silva, A.J.In the sports field, numerical simulation techniques have been shown to provide useful information about performance and to play an important role as a complementary tool to physical experiments. Indeed, this methodology has produced significant improvements in equipment design and technique prescription in different sports (Kellar et al., 1999; Pallis et al., 2000; Dabnichki & Avital, 2006). In swimming, this ...
Biomechanics and energetics as determinant factors of competitive swimming perf...
Barbosa, Tiago M.; Marinho, D.A.; Garrido, N.; Costa, M.J.; Silva, A.J.
Longitudinal study in male elite swimmers: variation on performance, energetics...
Costa, M.J.; Bragada, José A.; Mejias, J.E.; Marinho, D.A.; Louro, H.; Lopes, Vítor P.; Silva, A.J.; Barbosa, Tiago M.
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