Aerobic Walking Exercise for Non-Ambulatory Stroke Survivors

Inclusion Criteria: * Independent ambulation before stroke * Be able to understand and follow verbal commands in English * Have physicians' approval for exercise, and be in stable medical condition * Participant's first stroke * Unable to walk independently according to Functional Ambulation Category (FAC) (\<2) after in-patient rehabilitation treatment * Between 6 weeks to 5 years after stroke onset Exclusion Criteria: * Current cardiovascular abnormalities other than stroke such as ischemic cardiovascular event or coronary artery bypass surgery less than 3 months ago * Musculoskeletal disorder which prevents subjects from participating in the exercise * Resting blood pressure more than 200/110 mm Hg * Current or previous pulmonary diseases in the past two years * Osteoporosis and restricted passive movement in the major joints of the lower limbs * Subjects will be excluded if they are unable to speak or understand English and/or unable to travel to the University of Kansas Medical Center (KUMC) Neuromuscular Research Laboratory