Design: This is a multicenter randomized controlled trial. * Participants: The study plans to recruit 66 adults, aged 45 to 64, with a confirmed diagnosis of T2DM. * Group Assignment: Participants will be randomly assigned to either a control group or an intervention group. * Control Group: Participants will receive only a Nutrition and Muscle Health Education Sheet and continue with their routine health management based on existing medical advice. * Intervention Group: Participants will receive the same leaflet along with a Diabetes and Muscle Health Handbook and will take part in a 12-week multimodal exercise program. * Assessments: All participants will be assessed at baseline, week 6, and week 12. Outcome Measures * Primary Outcomes: o Physical Function: Short Physical Performance Battery (SPPB), Five-Times Sit-to-Stand Test (5TSTS), handgrip strength, and Skeletal Muscle Mass Index (SMI). * Secondary Outcomes: * Metabolic Control: Glycated hemoglobin (HbA1c). * Quality of Life: SF-12 Quality of Life questionnaire. * Sarcopenia Risk: Evaluated by the SARC-CalF questionnaire. Expected Outcomes This study aims to provide an evidence-based and feasible multimodal exercise prescription for middle-aged adults with T2DM. The findings are expected to support early intervention strategies for healthy aging and serve as a valuable reference for clinical practice and the development of public health policies.