wmreed

Here's my stab at the first part:

The Aikido ExCo is an introduction to the basic principles and techniques of Aikido, a Japanese martial art using circular motion and redirection in order to control and subdue an opponent without the need to inflict injury.

In my opinion, this next sentence won't make any sense to someone who hasn't studied some aikido already. "What do you mean by openness and relaxation?" is the question I can imagine. I don't have a suggestion as of yet: Aikido is built around concepts of openness, relaxation, and being able to respond to any attack.

Only a minor change suggested here: As Aikido's effectiveness is not dependent on strength, it is suitable for all ages and physiques.