Many individuals post-stroke have a hard time walking independently and freely in their homes and communities. Therefore, it is not surprising that the number one goal stated post-stroke is to regain walking function and is a central focus in rehabilitation. Current recommendations for improving post-stroke walking speed involves walking at a constant or continuous speed, however an new approach is the use of interval training that includes alternating between higher intensity and low intensity periods. Interval training is shown to result in larger gains in speed in neurologically healthy subjects. Preliminary data show higher intensity interval training to be possible in individuals following stroke, however direct comparisons of interval training to continuous training on walking function are not known. For this study there are two required sessions with the possibility of being asked to participate in additional sessions. A minimum of 48 hours in required between sessions. Each session lasts approximately two and half hours.