What is the expected effect of exercise training in COPD patients?

• A. It leads to energy conservation and improved muscle function
• B. It worsens dyspnea
• C. It causes weight loss
• D. It has no effect

Answer: (B)

Exercise training improves energy efficiency and skeletal muscle function in COPD, which reduces the amount of energy needed to perform daily tasks and lowers ventilatory demand during activity. This leads to better exercise tolerance and less shortness of breath with exertion. Training enhances muscle strength, endurance, and oxidative capacity (mitochondrial density and capillarization), so activities feel easier and patients can do more without worsening dyspnea. Weight loss is not the primary expected effect of COPD exercise programs; the goal is often to preserve or build lean mass and improve overall function. In short, exercise training produces energy conservation and improved muscle function, with the accompanying benefit of reduced exertional dyspnea and enhanced activity capacity.