Abstarct: Background and Objective: Type 2 diabetes is one of the most common chronic mextabolic diseases worldwide, characterized by elevated blood glucose levels due to impaired insulin secretion or function. Research indicates that individuals with diabetes generally have lower sleep quality and quality of life compared to healthy individuals. Insufficient or poor-quality sleep can make blood glucose control more difficult and may exacerbate disease symptoms. This study aimed to investigate the effects of a 12-week aerobic training program, performed in continuous and interval formats, on sleep quality, quality of life, and body composition indices in individuals with type 2 diabetes. Methodology: This randomized clinical trial included 42 men and women with type 2 diabetes who were randomly assigned to three groups: continuous training (n = 15), interval training (n = 12), and control (n = 15). Participants in the training groups engaged in aerobic exercise three sessions per week for three months. The continuous group trained at 55–65% of heart rate reserve, while the interval group performed one minute of activity at 85–90% heart rate reserve followed by one minute of active recovery at 40–45% heart rate reserve. During the intervention, the training groups followed a diet with a 20% reduction in caloric intake, whereas the control group was instructed to maintain their usual lifestyle. At baxseline and post-intervention, participants completed the Pittsburgh Sleep Quality Index and the WHO Quality of Life questionnaire, which includes physical, psychological, social, and environmental domains. Body composition was measured in a fasting state using the InBody230 device. Results: The results showed significant improvement in the physical domain of quality of life in both training groups compared to the control group (P < 0.05). Additionally, the psychological domain improved significantly in both exercise groups (P < 0.05), whereas no significant changes were observed in the social and environmental domains (P > 0.05). Sleep quality scores improved in both continuous and interval training groups; however, the difference was not statistically significant compared to the control group (P > 0.05). Furthermore, body fat mass, body mass index (BMI), and body weight significantly decreased in both training groups. No significant differences were found between the continuous and interval training groups regarding changes in quality of life, sleep quality, or body composition variables. Conclusion: The findings indicate that both interval and continuous aerobic training combined with a calorie-restricted diet have positive effects on improving quality of life, sleep quality, and body composition in patients with type 2 diabetes. However, no significant difference was observed between the two exercise modalities in terms of the magnitude of changes. Therefore, both training approaches can be considered effective and appropriate methods, and individuals may choose either continuous or interval training baxsed on personal preference and time availability.