Autor(es)

Luches-Pereira, Gabriel ; Kalva-Filho, Carlos Augusto ; Bertucci, Danilo Rodrigues ; de Carvalho, Carlos Dellavechia ; Barbieri, Ricardo Augusto ; Papoti, Marcelo

• Tipo de documento: Artigo Científico
• Fonte: INTERNATIONAL JOURNAL OF SPORTS MEDICINE; v. 45, n. 05, p. 10-pg., 2024-02-12.

Resumo

The total anaerobic contribution (AC([La-]+PCr)) is a valid and reliable methodology. However, the active muscle mass plays an important role in the AC([La-]+PCr) determination, which might influence its reliability. Thus, this study aimed to investigate the effects of two exhaustive intensities on the reliability of the AC([La-]+PCr) during a one-legged knee extension (1L-KE) exercise. Thirteen physically active males were submitted to a graded exercise to determine the peak power output (PPO) in the 1L-KE. Then, two constant-load exercises were conducted to task failure at 100% (TTF100) and 110% (TTF110) of PPO, and the exercises were repeated on a third day. The blood lactate accumulation and the oxygen uptake after exercise were used to estimate the anaerobic lactic and alactic contributions, respectively. Higher values of AC([La-]+PCr) were found after the TTF100 compared to TTF110 (p=0.042). In addition, no significant differences (p=0.432), low systematic error (80.9 mL), and a significant ICC (0.71; p=0.004) were found for AC([La-]+PCr) in the TTF100. However, an elevated coefficient of variation was found (13.7%). In conclusion, we suggest the use of the exhaustive efforts performed at 100% of the PPO with the 1L-KE model, but its elevated individual variability must be carefully considered in future studies. (AU)

• Processo FAPESP: 16/12781-5 - Adaptações metabólicas, hematológicas e neuromusculares provenientes do treinamento "dormir alto e treinar baixo", seguido de um período de polimento: um estudo duplo-cego e randomizado.
• Beneficiário: Marcelo Papoti
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 16/09339-9 - Caracterização da fadiga em esforços com baixas quantidades de glicogênio muscular realizados em diferentes intensidades: um estudo duplo-cego e randomizado
• Beneficiário: Carlos Augusto Kalva Filho
• Modalidade de apoio: Bolsas no Brasil - Doutorado