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Young Swimmers’ Classification Based on Kinematics, Hydrodynamics, and Anthropometrics

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Summary:The aim of this article has been to classify swimmers based on kinematics, hydrodynamics, and anthropometrics. Sixty-seven young swimmers made a maximal 25 m front-crawl to measure with a speedometer the swimming velocity (v), speed-fluctuation (dv) and dv normalized to v (dv/v). Another two 25 m bouts with and without carrying a perturbation device were made to estimate active drag coefficient (CDa). Trunk transverse surface area (S) was measured with photogrammetric technique on land and in the hydrodynamic position. Cluster 1 was related to swimmers with a high speed fluctuation (ie, dv and dv/v), cluster 2 with anthropometrics (ie, S) and cluster 3 with a high hydrodynamic profile (ie, CDa). The variable that seems to discriminate better the clusters was the dv/v (F=53.680; P<.001), followed by the dv (F=28.506; P<.001), CDa (F=21.025; P<.001), S (F=6.297; P<.01) and v (F=5.375; P=.01). Stepwise discriminant analysis extracted 2 functions: Function 1 was mainly defined by dv/v and S (74.3% of variance), whereas function 2 was mainly defined by CDa (25.7% of variance). It can be concluded that kinematics, hydrodynamics and anthropometrics are determinant domains in which to classify and characterize young swimmers' profiles.
Main Authors:Barbosa, Tiago M.
Other Authors:Morais, Jorge; Costa, Mário Jorge; Goncalves, José; Marinho, Daniel; Silva, António
Subject:Acceleration Athletic Performance Biomechanical Phenomena Child Competitive Behavior Female Humans Male Physical Fitness Swimming Anthropometry Hydrodynamics
Year:2014
Country:Portugal
Document type:article
Access type:open access
Associated institution:Universidade da Beira Interior
Language:English
Origin:uBibliorum

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