Upper Limb Exercises Using Varied Workloads and Their Association With Dynamic Hyperinflation in Patients With COPD

• Autor(a) principal: Colucci, Marcelo [UNIFESP]
• Data de Publicação: 2010
• Outros Autores: Cortopassi, Felipe [UNIFESP], Porto, Elias [UNIFESP], Castro, Antonio [UNIFESP], Colucci, Eduardo [UNIFESP], Iamonti, Vinicius Carlos [UNIFESP], Souza, Gerson [UNIFESP], Nascimento, Oliver [UNIFESP], Jardim, Jose R. [UNIFESP]
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNIFESP
• Texto Completo: http://dx.doi.org/10.1378/chest.09-2878; http://repositorio.unifesp.br/handle/11600/32724

Background: Increased ventilation during upper limb exercises (ULE) in patients with COPD is associated with dynamic hyperinflation (DH) and a decrease in inspiratory capacity (IC). the best level of ULE load training is still unknown. Our objective was to evaluate the dynamic hyperinflation development during ULE using three constant workloads.Methods: This was a prospective, randomized protocol involving 24 patients with severe COPD (FEV(1) <50%) performing an endurance symptom-limited arm exercise of up to 20 min in an arm cycloergometer with different workloads (50%, 65%, and 80% of the maximal load). Ventilation, metabolic, and lung function variables (static IC pre-exercise and postexercise) were measured.Results: DH was observed during exercises with 65% (-0.23 L) and 80% (-0.29 L) workloads (P<.0001). Total time of exercise with 80% workload (7.6 min) was shorter than with 50% (12.5 min) (P<.0005) and with 65% (10.1 min; not significant). Oxygen consumption percent predicted ((V) over dot O(2)) (P<.01) was lower with 50% workload than with 80%. Eighty percent workload showed lower work efficiency (1:702 [mL/kg]/exercise time) than the other two workloads (P<.0001).Conclusion: Different workloads during upper limb exercises showed a direct influence over dynamic hyperinflation and the endurance exercise duration. CHEST 2010; 138(1):39-46