Tae Kwon Do
"Tae Kwon Do", literally meaning "the way of fist and foot", is a Korean martial art. It is many other things as well:

It's a set of techniques for blocking, kicking, punching, and avoiding attack.

It's a practical means of self defense.

It can be a path to self-knowledge and harmony.

It's a competitive sport.

It can be an outlet for stress.

It's a way to develop balance, coordination, and control.

Tae Kwon Do can be some, or all, of these things to those who practice it.