Validity and Reliability of Mixed Reality-Based Functional Mobility Tests in Type 2 Diabetes

Inclusion Criteria: * Diagnosed with Type 2 Diabetes Mellitus by a physician, * Aged between 18 and 65 years, * Ability to ambulate independently without the use of an assistive device, * No participation in a structured exercise program within the previous 6 months, * Cognitive ability sufficient to understand and follow test instructions, * Visual, auditory, and vestibular functions sufficient to tolerate mixed reality applications, * Ability to read, understand, and follow instructions in Turkish, * Willingness to participate voluntarily in the study and provision of written informed consent. Exclusion Criteria: * Presence of proliferative diabetic retinopathy or severe non-proliferative diabetic retinopathy, * Advanced peripheral neuropathy, active foot ulcer, Charcot foot, or significant sensory loss that may compromise safe test performance, * Presence of peripheral arterial disease, * Advanced renal failure, requirement for dialysis, or nephropathy that may compromise exercise safety, * Myocardial infarction within the previous 6 months, * Unstable ischemic heart disease or uncontrolled angina, * Resting blood pressure greater than 160/100 mmHg, * Presence of severe musculoskeletal, neurological, or vestibular disorders that may interfere with safe test performance, * High risk of balance loss or spatial disorientation in the mixed reality environment due to visual, auditory, or balance impairments, * Cognitive, behavioral, or compliance-related problems that may prevent completion of the study procedures.