A striking masculine man seated on gym equipment, mid-torso to upper

Prompt

A striking masculine man seated on gym equipment, mid-torso to upper thighs centered. He wears a black Nike tank top with white swoosh and black athletic shorts with blue side stripes. His right hand grips the handlebar while his left arm rests near his thick thigh in full-bleed vertical composition. Clean negative space frames broad shoulders against a gray wall background. Vertical portrait captures defined biceps, triceps, and thick thighs for screen-safe wallpaper., 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