When you come in for your test, we'll ask you some general questions about your overall state of health as well as any symptoms you might currently be experiencing.  Your blood pressure, resting heart rate and a resting electrocardiogram will be taken.  Following this, you'll be fitted with a mask that contains an analyzer that measures airflow into and out of your lungs, as well as the amount of oxygen inhaled and carbon dioxide exhaled.  Baseline measurements of lung function will be obtained by having you breath in and out several times, and a resting metabolic rate will be recorded as well.  Following this, you will be exercised on a treadmill, with ongoing measurements of your heart response, respiratory gas exchange, pulmonary function and blood pressure.  The test is progressive in the sense that it becomes more difficult over time, and we will continue to monitor you either until you tell us to stop or there is a reason to stop the test that is noted from the testing data.  After the test is over, we will continue to monitor your blood pressure, heart rate recovery, electrocardiogram and any symptoms that may be present.  Once the test is complete, we'll arrange a follow-up visit to review the test results and what they mean to you.