Clinical Research Directory

Inclusion Criteria: * Aged 13-16 years; * Diagnosed with acute lymphoblastic leukemia (ALL) by a pediatric hematology-oncology specialist; * Undergoing consolidation or maintenance chemotherapy; * Clinically stable and medically cleared by the responsible pediatric hematology-oncology specialist to participate in moderate-intensity physical activity; * Able to read and understand Turkish and have sufficient cognitive capacity to complete the data collection forms independently or, when necessary, with assistance from the researcher; and * Willing to participate in the study, with written assent obtained from the adolescent and written informed consent obtained from a parent/legal guardian. Exclusion Criteria: * Receiving intensive treatment for active relapse, being clinically unstable, or not being medically cleared by the responsible pediatric hematology-oncology specialist to participate in physical activity; * Having a severe cardiovascular, respiratory, neurological, or musculoskeletal condition that contraindicated participation in exercise; * Having a severe functional limitation that prevented the safe performance of physical activity; * Being unable to participate in the intervention or data collection procedures because of a diagnosed severe psychiatric or cognitive disorder; or * Participating in another structured exercise or psychosocial intervention program during the study period that could affect the study outcomes.