Stroke Rehabilitation Through Intensive Exercise

The goal of this clinical trial is to learn whether combining moderate to high intensity aerobic exercise with constraint-induced movement therapy (CI therapy) can improve walking ability in adults who have had a stroke. The study will also learn if telerehabilitation at home can support long-term recovery after intensive rehabilitation. The main questions this study aims to answer are: * Does moderate to high intensity aerobic exercise before CI therapy improve walking ability, balance and lower extremity function in people with long-lasting gait difficulties after stroke? * Does CI therapy alone lead to similar or different improvements in walking ability, balance or lower extremity function? * Does telerehabilitation help participants maintain or further improve their function after the intensive rehabilitation period? Researchers will compare two groups. One group will receive 4 weeks of CI therapy, 5 days per week, plus 20 minutes of moderate-to-high-intensity aerobic exercise before the rehabilitation session on 3 of these days, and the other group will receive 4 weeks of CI therapy, 5 days per week, without preparatory aerobic exercise. After the completion of CI therapy, all participants will be offered an individualized 8-week telerehabilitation program to follow at home. They will use a mobile application to report physical activity and follow instructions for telerehabilitation. All participants will complete two assessment visits (about 3 hours each), 1-2 weeks before and 1-2 weeks after CI therapy. They will also complete questionnaires electronically after the telerehabilitation program. Daily activity will be measured twice during the study: once during a week after the intensive rehabilitation and once during a week after the telerehabilitation program. A small movement sensor worn on the thigh will be used. The sensor is attached with a soft strap or an adhesive patch and is comfortable to wear all day. The sensor shows how much a person walks