한다

한다

"한다" means "does" or "do" (declarative form in present tense).

In this sentence, '한다' is used to indicate the act of doing or engaging in a habitual activity, which is exercising in this context.

그는 매일 운동을 한다.

He exercises every day.

Here, '한다고' is a quoted form of '한다', reflecting the act of making a decision as reported speech.

그녀는 어제 결정을 한다고 말했다.

She said yesterday that she would make a decision.

In this case, '한다' denotes participation in an activity or game with others.

나는 친구들과 게임을 한다.

I play games with friends.