This study is designed to make sure exercise equipment used by the National Heart, Lung, and
Blood Institute is working properly. Healthy volunteers will be requested to use P-CCMB
cardiopulmonary exercise equipment (treadmills and exercise bicycles) two times a month to
ensure the machines are functioning properly.
Proper functioning of recently acquired P-CCMB cardiopulmonary exercise equipment will be
verified by testing healthy volunteers. In addition, quality control will be verified by
performing monthly testing of healthy volunteers as biologic standards.
Healthy research volunteers who are between 21 and 65 years.
Patients with a history of ischemic or valvular heart disease.
Patients with history of chronic pulmonary disease.