High Intensity Interval Training for People With Stroke Deficits

Inclusion Criteria: * clinical diagnosis of stroke (hemorrhagic or ischemic), * ability to walk at least 100 m independently with or without an assistive device with no severe limitations due to pain, * living in the community at least 10 weeks post stroke (no upper limit) with a stroke-related motor impairment score of \<7 on the Chedoke-McMaster Stroke Assessment scale of the leg or foot or with hemiparetic gait pattern, * no severe communicative aphasia or comprehensive aphasia as noted in in clinical reports or referral form * no orthopedic issues that may be aggravated by HIT * ability to provide informed consent Exclusion Criteria: * severe uncontrolled hypertension or orthostatic blood pressure decrease of \>20 mmHg * other cardiovascular morbidities which would limit exercise tolerance (e.g. horizontal or downsloping ST-segment depression \>2 mm, symptomatic aortic stenosis, complex arrhythmias), * unstable angina, * severe proliferative retinopathy or uncontrolled blood glucose, * hypertrophic cardiomyopathy * lower extremity claudication * cognitive and/or behavioral issues limiting participation in exercise testing and training, prior unrelated neurological disorders or psychiatric illness * abdominal or inguinal hernia causing discomfort with routine activities. Other issues will be considered case-by-case.