IDENTITY PRESERVATION INSTRUCTION:
Using the uploaded photo as reference, preserve the person's exact facial features, face shape, eye color, skin tone, and unique characteristics while transforming them into a marathon runner. Maintain facial identity, recognizable bone structure, and personal characteristics throughout the athletic transformation.

TRANSFORMATION DESCRIPTION:
Transform the person into a dedicated marathon runner captured during a race. The subject should be wearing professional running gear: moisture-wicking athletic shirt, running shorts or tights, proper running shoes, and a race bib with visible numbers. Include realistic sweat beads on forehead and temples, slightly flushed skin from exertion, and an intense, focused facial expression showing determination. Hair should appear slightly windblown as if in motion. The pose can be either mid-stride running or a determined runner's stance at a race moment. The overall look should be authentic, athletic, and inspiring.

STYLE AND AESTHETIC PARAMETERS:
- Photorealistic, cinematic sports photography style
- Dynamic, energetic lighting with natural outdoor sunlight or stadium lighting
- Slightly warm skin tones with natural flush from exertion
- High-contrast athletic aesthetic with crisp details
- Background: marathon race environment - city streets with cheering crowds, finish line arch, or scenic race course with other runners in soft focus
- Motion blur elements to suggest speed and energy
- Professional sports photography quality

TECHNICAL QUALITY PARAMETERS:
- High resolution, 4K, detailed
- Sharp focus on face with natural skin texture preserved
- Professional sports photography quality
- Cinematic aspect ratio (16:9) or portrait (4:3) for dynamic composition
- Clear athletic details: race bib, running shoes, sweat texture, hair movement
- Natural athletic lighting with rim light for depth

NEGATIVE PROMPT GUIDANCE:
Avoid: distorted facial features, unrealistic proportions, blurry face, loss of likeness, unnatural body proportions, stiff unnatural pose, poor clothing integration, artificial-looking sweat, exaggerated muscle definition, cartoonish appearance, low resolution, blurry athletic gear, unrecognizable face

USER CUSTOMIZATION:
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Additional Tips:
- For best results, use a clear front-facing photo with good lighting
- The AI will keep your face but apply athletic features like sweat and flushed skin
- You can specify preferred running gear colors or style in the additional context
- Mention if you prefer a specific race environment (urban marathon, trail run, stadium)
- Indicate desired intensity level: casual jogger vs competitive racer