Prospective Aerobic Reconditioning Intervention Study

The purpose of this study is : * To determine if aerobic exercise conditioning can improve symptoms, cardiovascular function and quality of life in elderly patients with congestive heart failure. * To describe the baseline clinical characteristics, cardiovascular function and neurohumoral function in elderly patients with congestive heart failure. * To determine the specific cardiovascular and noncardiovascular mechanisms by which symptoms and quality of life may improve following exercise conditioning in elderly patients with congestive heart failure.