Introduction: Sedentary behaviour among individuals with intellectual disabilities, driven by barriers such as limited access to adapted programs and low self-efficacy, contributes to chronic health conditions. This study evaluates the effectiveness of the Valemee Visual System (VVS), a novel tool offering visual support and structured exercise programming, in improving physical fitness and promoting exercise independence in this population. Methods: A repeated measures design was employed with an 8-week intervention involving 22 participants aged 22-44 with mild to moderate intellectual disabilities. The program utilised the VVS for total body fitness training. Results: Participants demonstrated significant improvements in grip strength, sit-to-stand performance, bench press capacity, 400-m walk time, and flexibility. Self-efficacy increased, and reduced reliance on prompts indicated greater exercise independence and autonomy. Conclusions: The VVS shows promise in enhancing physical fitness, accessibility, and adherence in adults with intellectual disabilities, supporting long-term health and reducing chronic disease risk.