What makes Karate a valuable activity other than for sweating and physical fitness?

Traditional karate classes teach formal etiquette such as kneeling and bowing, exercises for training, and basic technique while moving.

Most important is the teaching of kata; without Kata there is no Karate and no art. Kata is a series of movements based on principals of self-defense and executed in a specified series of stepping and moving.

Bunkai is the application of kata with a partner. The two types of Bunkai are Kihon Bunkai, or standard application, and Oyo Bunkaim, or variations on the standard.

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Besides lots of sweating what can I expect in a traditional karate class?