In Taiwan, there are 220,00 stroke survivors and each year, 10,000 new suffers causing impairment in daily activities. This is the leading cause of disability and consumes 4.5 billions of National Health Insurance yearly. More than half of them become hemi-paretics and hemi-plegics. Stroke leads to the adverse combination of reduced functional capacity and increased energy demands to perform routine activities Thereby, physiologic fitness reserve is diminished. Aerobic fitness is low in stroke survivors. Among ambulatory patients suffering from hemiparetic stroke, the VO2peak is approximately half that of age-matched individuals , a level that is near the minimum range required for activities of daily life. It may limit their ability to perform everyday activities and cause further complications, such as cardiopulmonary de-conditioning, muscular atrophy, joint stiffness, or even learned nonuse.