Anaerobic threshold in running and swimming rats: determination using two mathematical methods - doi: 10.4025/reveducfis.v21i2.7681

• Main Author: Manchado-Gobatto, Fúlvia de Barros
• Publication Date: 2010
• Other Authors: Gobatto, Claudio Alexandre, Ribeiro, Carla, Mota, Clécia Soares de Alencar, Araujo, Gustavo Gomes de, Araújo, Michel Barbosa de, Mello, Maria Alice Rostom de
• Format: Article
• Language: por
• Source: Journal of Physical Education (Maringá)
• Download full: https://periodicos.uem.br/ojs/index.php/RevEducFis/article/view/7681
• topic: Incremental test; Anaerobic threshold; Rats; Teste progressivo; Limar anaeróbio; Ratos; Limiar anaeróbio; teste progressivo; ratos

The study aimed to determine the anaerobic threshold (AT) with incremental test in swimming and running rats, using two mathematical methods for analysis: fixed blood lactate concentration and visual inspection of inflection point preceded by bi-segmental linear regression. Swimming (n=19) and running rats (n=29) were used. The incremental test was composed by 5 minutes of exercise with blood collection after loads for lactate concentration determination. The AT was determined by fixed lactate concentration (4.0; 4.5;5.0; 5.0mmol/L) and the visual inspection of inflection point of the lactate curve, preceded by intersection of the bi-segmental linear regression. The AT intensities were compared by one-way Anova. In swimming rats the best analysis for AT determination seems to be fixed blood lactate in concentrations (5.0 and 5.5mmol/L, load=4.2±0.1%bw). In treadmill running, the bi-segmental linear regression was possible with 67.2% of animals (AT=21.1±0.9 m/min) and this method seems to be the adequate for running rats.