Abstract
Exercise testing is a valuable tool in clinical practice. It has many applications, including diagnosis, screening, evaluating treatment and determining the prognosis and severity of disease. Its methodology is varied but comparisons of methodology were performed that make it possible to obtain comparable information from almost any method of testing. The addition of microprocessors to medical instrumentation and the use of nuclear imaging can improve exercise testing. Exercise testing plays an important role in cardiac rehabilitation and in the prescription of exercise for apparently healthy individuals.