In an indoor gymnasium with a blue floor marked by green, white, and black lines, four figures are engaged in an apparent self-defense training activity

In an indoor gymnasium with a blue floor marked by green, white, and black lines, four figures are engaged in an apparent self-defense training activity. A man in a navy blue tracksuit faces a young man dressed in black. The man in the tracksuit appears to be instructing or demonstrating a defensive technique. Behind them, another young man in black stands holding a padded shield. Another person dressed in black stands off to the side, seemingly waiting for their turn. The background consists of a light brick wall with a white sign partially visible, reading "Defense...". Overhead lighting is evident, and miscellaneous objects like water bottles are scattered around the perimeter. The scene suggests a focused and disciplined training environment.