<qa>  What is the goal of the study?As a group, stroke survivors are more physically inactive than even the most sedentary older adults. Lack of physical activity has serious consequences in persons with stroke, including an increased risk of recurrent stroke, developing other diseases and mortality. Current rehabilitation interventions do little to improve real-world walking activity after stroke, suggesting that simply improving walking capacity is not sufficient for improving daily physical activity after stroke. Rather, the investigators hypothesize that the combination of a fast walking intervention that improves walking capacity, with a step activity monitoring program that facilitates translation of gains from the clinic to the real-world, would generate greater improvements in real world walking activity than with either intervention alone. Data from the investigators lab provides support for this hypothesis; however, it suggests that the greater efficacy of combining the 2 interventions depends on a participants initial walking activity. Thus, the investigators do not expect that one intervention will be superior to the others for all participants, but rather that the combined intervention will be superior for those with low levels of baseline walking activity, speed and endurance. The specific objective of this study is to test whether and for whom combining fast walking training with a step activity monitoring program FASTSAM is superior in improving real-world walking activity compared to fast walking training alone FAST or a step activity monitoring and feedback program alone SAM in those with chronic stroke. Using a randomized controlled experimental design, 225 chronic 6 months stroke survivors, will complete 12 weeks of fast walking training FAST, a step activity monitoring program SAM or a fast walking training step activity monitoring program FASTSAM. Moderation of specific intervention outcomes by baseline characteristics will be evaluated to determine for whom the interventions are effective. 