Muscle glycogen and anaerobic threshold for swimming rats

• Autor(a) principal: Azevedo Voltarelli, Fabrício
• Data de Publicação: 2008
• Outros Autores: Mello, Maria Alice Rostom de, Alexandre Gobatto, Claudio
• 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/940
• topic: Limiar anaeróbio; ratos; natação; glicogênio muscular; jejum.

Anaerobic threshold (AT) can be defined as the workload in which blood lactate starts to accumulate exponentially during exercise. In humans, the AT determined by a lactate minimum test (LMT) is influenced by reductions of muscle glycogen stores, which is caused by low blood lactate concentrations. On the other hand, workload is not affected. The literature lacks information about this phenomenon in laboratory animals. The present study attempted to verify the effects of the reduction of the muscle glycogen stores on the AT determined by LMT in rats exposed to a 48-hour fasting. The animals’ responses were similar to those described in the literature for human beings. That is, the depletion of the muscle glycogen stores is unaffected by workload equivalent to the AT, but it shows reduced blood lactate concentration.