Avaliação da potência e capacidade anaeróbia dos músculos do braço de pacientes com DPOC

• Ano de defesa: 2011
• Autor(a) principal: Iamonti, Vinicius Carlos [UNIFESP]
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de São Paulo (UNIFESP)
• Palavras-chave em Português: Ácido láctico; Membros superiores; Wingate; Doença Pulmonar Obstrutiva Crônica; Atividades cotidianas; Teste de esforço
• Link de acesso: http://repositorio.unifesp.br/handle/11600/9031

Introduction: Important daily living activities are accomplished with upper extremities and COPD patients are usually limited in this field. However, it remains to be determined the behavior of the anaerobic metabolism of COPD patients when accomplishing exercises of high intensity and short duration with the arms. Objective: The purpose of this study was to explore arm anaerobic metabolic profile and lactate concentration of mild to moderate COPD patients accomplishing a 30-s Wingate anaerobic test. Methods: 24 male COPD patients (FEV1 73.2±15.2% pred, age 65.8±10) and 17 health subjects (FEV1 103.6±11.5% pred, age 66.2±7.2) underwent an arm 30-s Wingate anaerobic test to compare peak power, mean power, fatigue index and lactate concentration. Measurements and main results: Peak power and mean power output were significantly lower in COPD than in control group (211±119 vs.281±80W p<0.04 and 124±59 vs.182±35 W p<0.02, respectively). Blood lactate concentration in the control group was significantly higher than in COPD at the end of the test (7.0±1.5 vs. 5.5±2 mmol-1; p<0.01) and at the peak concentration (11±1.9 vs. 8.7±2.6 mmol-1; p<0.02). The ratio mean power/muscle area (W/cm2) was lower in COPD than the control group (p<0.01). Conclusions: COPD showed a lower anaerobic peak and mean power output compared to a control group. The Wingate anaerobic test was shown to be useful for measuring the anaerobic metabolism during an arm exercise in patients with COPD. The impairment in the glicolytic system may have some impact on patient’s independence to perform activities of daily living and our results suggest that there must be a structural muscle dysfunction at an early stage of the disease.