Gym Training Poster Prompt for Boys

Create a photorealistic vertical 9:16 gym poster of the boy from the reference photo, keep his face same as reference with identical features and focused calm expression, not CGI, not illustration. He stands in a strong static pose in a dark modern gym holding no weights, wearing a fitted black training t-shirt and wristband, arms relaxed at his sides with both hands fully visible showing five natural fingers. Leave the top third of the frame as clean empty dark space for gym quote text, place the subject in the lower two thirds with blurred equipment and spotlights behind. Capture with a Canon EOS R7 and 50mm f/1.8 lens look, high contrast athletic grade, sharp focus on the face, defined muscle shading with natural proportions, detailed fabric texture, realistic sweat-free clean skin and strong shadows. Preserve his facial identity exactly without face change or body distortion, natural anatomy, no extra fingers, no blurred hands, no warped equipment, no melted dumbbells. Finish with gritty athletic film grain for a real fitness poster feel.