3D Model: A Realistic Male Physical Education Teacher, 35 Years Old, Muscular Build, Wearing A Red Tracksuit With White Stripes, White Sneakers, And A Whistle Around His Neck, Crouching In A Proper Race Start Position On An Outdoor Running Track. The Teacher Has Short Black Hair, A Focused Expression, And Detailed Skin Texture With Slight Sweat. Use Photorealistic Style, PBR Textures With Shiny Fabric For The Tracksuit, And Soft Daylight Lighting From Above. No Background Objects, No Distorted Limbs, No Blurry Textures.