A very muscular adult man stands full-body facing the camera in a gym

Prompt

A very muscular adult man stands full-body facing the camera in a gym mirror selfie. He wears a dark grey crew-neck short-sleeve athletic t-shirt, black mid-thigh shorts, calf-high socks, and black sneakers. His left hand holds a phone near his face while his right hand rests on his hip with fingers in the pocket. The setting is an indoor studio with a plain grey wall and red barbell across lower rubber flooring. Even artificial lighting illuminates light to medium skin tones. Vertical 13:19 crop, head cropped at chin by frame edge., wearing underwear or swim trunks, covered genitals, no frontal nudity, a single uninterrupted photograph only, no written words or typography anywhere in frame, no captions, no app UI, no social-media post layout, no screenshot borders