l3n0v0, gymmirrorcreator, photorealistic adult man taking a mirror selfie in a modern gym after a workout, standing in front of a large wall mirror, holding a smartphone vertically in his left hand at chest height, his reflection clearly visible in the mirror, looking at his reflection with a confident relaxed expression, flexing his right arm and showing a defined natural bicep, elbow bent at approximately ninety degrees, fist gently clenched, athletic muscular physique with realistic proportions, defined shoulders and arms, short textured dark hair, light stubble beard, natural realistic skin texture, wearing a fitted black sleeveless training shirt, dark gray gym shorts, white crew socks, white training shoes, simple black fitness watch, dumbbell rack, cable machines, workout benches and rubber gym flooring in the background, several adult gym members training in the distant background, softly blurred, soft neutral overhead gym lighting, accurate realistic mirror reflection, authentic candid smartphone fitness photograph, subtle phone-camera grain, vertical 4:5 composition, sharp focus on the man