身穿黑色Nike上衣的年輕男子獨自在健身房擺姿勢拍側面自拍，微微轉頭、神情自信

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The young man in black Nike shirt poses alone in the gym for a stylish side-view selfie. He makes subtle natural movements, slight head turns, confident expression, soft body shifts, cool fluorescent lighting, photoreal social media vibe.