Training in Aikido is really beginning less and endless. It is like entering a flowing river; you enter when and where you do and you exit when and where you do. It is seldom taught like a course with a definite beginning and end. To the serious student, Aikido is a lifelong process, even after one discontinues training on the mat; the lessons we learn in the dojo are directly applicable to our daily life, and we should all make a concerted effort to make those connections.
Aikido practice, done correctly, is aerobic, and can be strenuous and demanding but not rough. We work on developing quality movement skills that are circular, flowing, and graceful and emanate from a secure stable center.