Background and Purpose: Previous work demonstrates that older adults have a lower response in the middle cerebral artery velocity (MCAv) to an acute bout of moderate intensity exercise when compared to young adults. However, no information exists regarding MCAv response to exercise post-stroke. We tested whether MCAv response to an acute bout of moderate intensity exercise differed between participants 3 months post-stroke and an age-and sex-matched control group of older adults (CON). A secondary objective was to compare MCAv response between the stroke and non-stroke affected MCAv. Methods: Using transcranial Doppler ultrasound, we recorded MCAv during a 90-second baseline (BL) followed by a 6-minute moderate intensity exercise bout using a recumbent stepper. Heart rate (HR), end tidal CO2 (PETCO2) and beat-to-beat mean arterial blood pressure (MAP) were additional variables of interest. The MCAv response measures included: BL, peak response amplitude (Amp), time delay (TD), and time constant (τ). Results: The Amp was significantly lower in the stroke affected MCAv compared to CON (p < 0.01) and in the non-affected MCAv and compared to CON (p = 0.03). No between-group differences were found between TD and τ. No significant differences were found during exercise for PETCO2, and MAP while HR was lower in participants with stroke. (p < 0.01). Within the group of participants with stroke, no differences were found between the stroke-affected and non-stroke affected side for any measures. Discussion and Conclusions: Resolution of the dynamic response profile has the potential to increase our understanding of the cerebrovascular control mechanisms and test cerebrovascular response to physical therapy driven interventions such as exercise. Video Abstract available for more insights from the authors (see Video, Supplemental Digital Content 1).