Effect of Breather in COPD Patients With Intermittent Claudication

This study is testing whether a breathing device called "The Breather" (a respiratory muscle trainer) can help men with both COPD (a chronic lung disease) and intermittent claudication (leg pain during walking caused by poor circulation) improve their exercise ability and symptoms. **You may be eligible if...** - You are a male between 55 and 60 years old - You have been diagnosed with moderate COPD (stage 2–3) - You have a normal body weight (BMI 18.5–24.9) - You experience leg pain during walking (unilateral exertional leg pain) - Your condition is clinically stable **You may NOT be eligible if...** - You have neurological disorders - You have a history of bone fractures - You have other serious lung complications - You are female or outside the age range Talk to your doctor to see if this trial is right for you.