Mechanical and metabolic parameters of front crawl swim performance at supramaximal intensity

• Autor(a) principal: Pessôa Filho, Dalton Müller
• Data de Publicação: 2008
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Motriz (Online)
• Texto Completo: https://www.periodicos.rc.biblioteca.unesp.br/index.php/motriz/article/view/773
• topic: Custo energético; eficiência mecânica; potência mecânica; força de arrasto ativo

The purpose was to analyze crawl performance at supramaximal intensity (vmax) from relationships between anaerobic energy (Eanaer), mechanical and propulsive power (Po, Pu), mechanical and propulsive efficiency (emec, ep), and drag force (Fr). Eleven experience swimmers were undergone to the measurement of Fr from Velocity Perturbation method, and to the estimative of ep from Fr relationships to hydrofoil action. Eanaer was estimated from lactate and phosphocreatine energy equivalents. Correlations of vmax to Eanaer (0,72), economy (0,65), Fr (0,68), Pu (0,79), and Po (0,69) shown a trend to force, power and energy release to determine performance at vmax. Once Eanaer became constrained, only economy was able to accommodated to these context (-0,95), whereas emec improve their influence on Fr (0,97), Pu (0,90), and Po (0,98). In conclusion, work rate is the main parameter to ensure supramaximal performance, and Eanaer is the major factor in power availability, but when constrained, emec and economy interactions plays a fundamental role.