A man with short dark hair and a black t-shirt is engaged in speed bag training indoors. He stands facing a speed bag, which is suspended from a wooden platform attached to a metal stand. The man rhythmically strikes the speed bag with alternating fists, demonstrating focus and controlled movements. The background features a wall with green, square tiles in the upper section and vertical wooden panels below. A sign with Cyrillic text is affixed to the wooden panel behind the man, with visible words "Изисквания за боксува" (Requirements for boxing) and a pictogram of a person. A round wooden object is partially visible in the lower left corner of the frame.