Muscular Character Transformation — Identity Preserved

Edit the reference image. Preserve the person's identity, facial features, hairstyle, skin tone, age, clothing, pose, camera angle, lighting, background, and overall visual style. Automatically adapt the body transformation to the person's apparent gender and existing anatomy. Give the person a naturally muscular, athletic physique with broader shoulders, defined arms, stronger chest, back, and legs, and realistic muscle proportions. Keep the transformation anatomically natural and consistent with the original body structure. Do not change the face or make the person look like a different individual. Keep the original clothing and pose, with realistic fabric deformation around the enhanced physique. Photorealistic, subtle and believable muscle definition, natural proportions, high detail.