Efeitos da Fadiga na Téncica de costas - Análise Cinemática

Universidade Técnica de Lisboa
Faculdade de Motricidade Humana

INFLUÊNCIA DA FADIGA NAS CARACTERÍSTICAS
CINEMÁTICAS DA TÉCNICA DE COSTAS

Dissertação elaborada com vista à obtenção do Grau de Mestre na especialidade de Treino de Alto Rendimento

Orientador: Professor Doutor Francisco José Bessone Ferreira Alves

Júri
Presidente: Professor Doutor José Henriques Fuentes Gomes Pereira
Vogais: Professor Doutor João Paulo Vilas-Boas Soares Campos
Professor Doutor António Prieto Veloso
Professor Doutor Francisco José Bessone Ferreira Alves

Luís Miguel Carneiro Cardoso
2004

KINEMATICAL CHANGES INDUCED BY FATIGUE ON BACKSTROKE SWIMMING

Keywords: Backstroke, fatigue, kinematics, technical analysis

In race situation fatigue is the critical factor disturbing technical efficiency. The aim of this study is to verify fatigue-induced changes in the kinematic characteristics of backstroke swimming.
Six international swimmers performed 6x50m with 10’’ interval at a swim velocity corresponding to the race pace of 200m backstroke. The swim were filmed whole body at the 2nd and 6th repetitions, for a complete stroke cycle, with two video cameras (two underwater, two above the water) for 3D kinematical analysis (APAS). In spite of a clear decrement of swim velocity from 2nd to 6th repetition (p<0.05) there were no changes on the stroke cycle, on the spatial and temporal structures of the arm stroke and on the intracycle variation of the horizontal velocity of the body center of mass (CM).
However, it was observed a larger vertical displacement of the CM, together with a decrease in joint movement amplitude in the hip and knee.
These group of swim, in spite of their high technical level, showed strong assimetry between arm stroke, concerning the under water pattern.

AGRADECIMENTOS

Ao Prof. Doutor Francisco Alves, meu treinador, professor e orientador, pela sua notável qualidade científica e empenho demonstrados na resolução dos vários problemas e questões que se foram colocando