Avaliação da eficacia de materiais texteis na atividade fisica / Evaluation of textile materials efficiency in physical activity

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

The present study “Evaluation of Textile Materials Efficiency in Physical Activity” compared how the different properties of fibers, like cotton and polyamide 6.6, affect sportive performance. The purpose of this study was to evaluate the improvement of physical performance during physical activities due the use of clothing made with high technology fabrics. For this comparative study, two raw material were chosen, cotton and polyamide 6.6, and through the properties of these samples, such as thermal conductivity, thermal resistance, water retention, moisture absorption and drying time, these fabrics behavior was studied, comparing them. Heat balance of human body, the mechanisms of heat transfer from skin surface to the external side of clothes, from clothing surfaces to the environment, heat transfer by conduction, convection, evaporation, respiration and radiation were analyzed and discussed. Corporeal temperature measurement of volunteers and its correlation with performance during physical activities were analysed through statistical methodology, using a statistical program. This research clearly demonstrated the influence of fibers properties in sports performance, being of great importance to athletes continuous improvement during physical exercices. Polyamide 6.6 fabric presented a lesser loss of corporeal temperature during physical activity when compared to cotton fabric. The existence of a significant correlation between corporeal temperature and lactate index reduction was proved by this study. This correlation shows the importance of corporeal temperature variation during an activity performance: the lower is this variation, the greater is the reduction in the lactate index.

ASSUNTO(S)

polyamides desempenho cotton poliamidas performance algodão

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