Chronic obstructive pulmonary disease (COPD) is a lung disease caused by damage to the lungs over a long period of time, usually due to smoking. Symptoms include coughing and shortness of breath, and because it takes many years to see symptoms, COPD occurs most often in people over 60 and gets worse over time.
An individual with sleep apnea experiences breathing that stops and starts during the sleep cycle. The two main types of sleep apnea are central sleep apnea, when the brain isn't sending the right signals to the muscles that control breathing, and obstructive sleep apnea, when the throat muscles relax.
