Chronic GVHD (cGVHD) is a long-term illness that affects people who have had a hematopoietic transplantation (HCT), a procedure that replaces unhealthy blood-forming cells. cGVHD can harm many body parts and usually needs years of treatment, affecting how happy and healthy you feel, called quality of life (QoL). Physical activity helps improve QoL, but many kids can't join exercise sessions due to distance or risk of getting sick. This study wants to test if a virtual rehabilitation program, which means exercising with a therapist online, can help kids who had HCT. Kids aged 8 to 23, over 100 days post-HCT, can join. They'll meet a therapist online twice a week for half an hour, for 12 weeks. They'll use exercise tools like dumbbells and bands. The study checks if this program makes kids stronger and feel better.

• Program lasts 12 weeks with online sessions twice a week.
• Participants need a device and a reliable internet connection.
• Therapist-guided sessions to improve physical health and QoL.