aspectos relacionados à fadiga durante o ciclismo: uma abordagem biomecânica aspects related with fatigue during cycling: a biomechanical approach

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ID: 228510
2008
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Abstract
A fadiga muscular pode ser definida como a incapacidade funcional na manutenção de um nível esperado de força. As competições de ciclismo, especialmente provas de estrada, apresentam como característica longa duração e altas intensidades. Tais características resultam na instauração do processo de fadiga, que pode estar associado a mecanismos e fatores metabólicos que afetam os músculos (fadiga periférica) e o sistema nervoso central (fadiga central). O objetivo deste trabalho é fazer uma revisão sobre aspectos relacionados com as mudanças na técnica de pedalada e na atividade elétrica dos músculos envolvidos nesse movimento durante o processo de fadiga. Alguns desses aspectos têm sido reportados na literatura e podem ter repercussão na (1) magnitude, direção e sentido de aplicação das forças no pedal; no (2) padrão de ativação muscular; na (3) geração de força e, conseqüentemente, no (4) desempenho do ciclista. No entanto, poucos estudos associam a fadiga muscular ao comportamento das forças aplicadas no pedal e ao padrão da ativação muscular. Os resultados dos estudos revisados demonstram a incapacidade dos ciclistas em manter a força desejada, perda da técnica de pedalada e mudança nos padrões de ativação elétrica sob condições de fadiga.
Muscular fatigue can be defined as functional inability to maintain a desired force output. During cycling competition, especially road races, cyclists are required to exercise for extended duration at high intensities. These features often result in fatigue, which can be associated with metabolic mechanisms and factors affecting both muscles (peripheral fatigue) and the central nervous system (central fatigue). The aim of this study is to review aspects related to alterations in the pedaling technique and electrical activation of the muscles during a fatiguing exercise bout. Some of these alterations have been reported in the literature and can reflect on the (1) magnitude, direction, and sign of the forces applied on the pedal; (2) muscle activation pattern; (3) force generation; (4) and consequent performance of the cyclist. However, few studies have associated fatigue with pedal forces and muscle activation. The results of the reviewed studies have shown that cyclists failed to maintain a preset force level, alteration in the pedaling technique, and changes on the muscle activation pattern during cycling under fatigue condition.
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diefenthaeler2008revistaaspectos Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Fernando Diefenthaeler, Marco Aurélio Vaz
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Journal research disclosure
Year 2008
DOI
10.1590/S1517-86922008000500014
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-86922008000500014
Keywords
performance biomechanics fatigue cyclingsports medicine

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