CKD Stage 1-3

This clinical trial aims to determine whether a multimedia educational intervention can effectively improve physical fitness and physical activity levels in patients with chronic kidney disease (CKD), while also evaluating its overall outcomes. The study primarily seeks to answer the following questions: * Can multimedia education enhance CKD patients' cardiorespiratory endurance, muscle strength, flexibility, and physical activity levels? * Do patients receiving multimedia education demonstrate greater improvements in health behavior and fitness compared to those receiving standard education alone? Researchers will compare a multimedia educational video program with conventional patient education to assess whether the multimedia approach helps patients maintain regular exercise and improve physical performance. Participants will: * Be randomly assigned to either the multimedia education group or the standard education group. * Take part in a 12-week intervention and assessment period. * Undergo pre- and post-intervention evaluations, including: * Six-minute walk test, grip strength and chair-stand test, flexibility test, and body composition analysis (BMI, waist-to-hip ratio, InBody). * Completion of a physical activity questionnaire (IPAQ-C). The findings will be used to evaluate the clinical value of multimedia education in CKD management and to support the development of effective patient exercise education programs.