Low-intensity resistance training promotes a reduction of mechanical hyperalgesia and increase of muscle strength in rats submitted to the diffused chronic muscle pain model
Treinamento resistido de baixa intensidade promove redução da hiperalgesia mecânica e aumento da força muscular em ratos submetidos ao modelo de dor crônica muscular difusa
André Luiz Silva Santos; Mônica Deise dos Santos Rocha; Mateus Maciel Santos; Josimari Melo DeSantana
Abstract
Keywords
Resumo
JUSTIFICATIVA E OBJETIVOS: A síndrome da fibromialgia (SFM) é caracterizada por diferentes fatores, como dor crônica muscular difusa (DCMD), fadiga e alterações psicoemocionais. Dentre os modelos animais que mimetizam a SFM, o modelo de salina ácida é consolidado no desenvolvimento e na manutenção da DCMD. O treinamento resistido (TR) tem sido um método eficaz para redução da dor na SFM. Assim, o objetivo do presente estudo foi avaliar os efeitos do TR na resposta nociceptiva e motora em modelo animal de dor crônica muscular difusa.
MÉTODOS: Vinte e quatro ratos machos Wistar foram alocados em quatro grupos: treinamento resistido (TR), controle do TR, amitriptilina (AMITRIP) e controle da AMITRIP, todos os protocolos de tratamento tiveram duração de 4 semanas. A DCMD foi induzida em todos os ratos. Em seguida, os animais foram tratados com TR de baixa intensidade (40% 1 repetição máxima) e AMITRIP (10 mg/kg/dia). Foram avaliados o limiar mecânico de retirada de pata, a atividade locomotora e a força muscular.
RESULTADOS: Animais tratados tanto com TR quanto com AMITRIP apresentaram aumento do limiar mecânico de retirada de pata (p<0,05) em relação aos seus controles, sugerindo redução da hiperalgesia mecânica. Não foi observada melhora da atividade locomotora em todos os grupos (p>0,05). Animais com DCMD que realizaram TR obtiveram aumento da força muscular dos membros posteriores (p<0,0001) em comparação ao grupo controle do TR.
CONCLUSÃO: Treinamento resistido de baixa intensidade resultou em efeitos anti-hiperalgésicos e melhora da força muscular em animais submetidos ao modelo de DCMD.
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Referências
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Submetido em:
07/07/2023
Aceito em:
14/09/2023
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