Confiabilidade do limiar de lactato identificada pelo método visual
DOI:
https://doi.org/10.11606/issn.2317-0190.v18i1a103488Palavras-chave:
Ácido Láctico, Limiar Anaeróbio, Exercício, MulheresResumo
Limiar de lactato (LL) tem sido utilizado como medidor de condicionamento físico, indicador sensível do estado do treinamento aeróbico em sujeitos saudáveis e doentes, além disso, auxilia na identificação do estímulo de treinamento ideal e na prescrição da intensidade de treinamento. O objetivo do presente estudo foi avaliar a confiabilidade intra e interexaminadores das medidas do LL obtidas através do método de detecção visual. Para isso, 31 voluntárias do sexo feminino (67,50 ± 4,41 anos; 1,52 ± 0,07 m; 64,55 ± 11,46 kg), aparentemente saudáveis e no período pós-menopausa, participaram do estudo. O LL foi determinado a partir de um teste realizado na esteira ergométrica até a fadiga, que consistiu de estágios com carga progressiva (variação da velocidade e/ou inclinação). Amostras de sangue foram coletadas por meio de uma punção na polpa digital do dedo médio a cada 3 minutos durante o teste. Em seguida, foram construídos os gráficos do método de detecção visual (software Prisma5) a partir da concentração de lactato sanguíneo coletado a cada estágio do exercício (intervalo de 3 minutos) em função da taxa de trabalho correspondente ao consumo de oxigênio (VO2) estimado durante o teste na esteira. A análise estatística foi realizada através do Coeficiente de Correlação Intraclasse (CCI). A confiabilidade intraexaminador foi excelente (0,950 - 0,952) e a confiabilidade interexaminadores foi boa (0,789 - 0,770). Dessa forma, sugere-se que o método de detecção visual é uma forma segura e confiável para detectar o LL na prática clínica e em pesquisas.
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