A Fit3D scan provides a detailed 3D image of your body, capturing measurements like circumference at key points, body fat percentage, muscle mass, posture analysis, and a "Body Shape Rating" (BSR) which compares your body composition to others with similar demographics, allowing you to track progress over time by comparing scans taken at different points in a fitness program; all this is achieved through a quick, non-invasive process using infrared cameras to capture your body from multiple angles, generating a 3D avatar that can be rotated and analyzed.