A group of people is performing karate in a large room

A group of people is performing karate in a large room. They are all wearing white karate uniforms with different colored belts, mainly black and red. The group is arranged in rows and is performing punching and kicking motions in unison. An instructor appears to be leading the group from the front, giving verbal cues. The room has a modern design, with a dark floor and a ceiling with bright, round lights. The background features a wall with a textured surface and red lighting. There are other people observing the training in the background, some standing on a raised platform.