Like other martial arts, aikido has step-by-step gradings that are classified into two main categories of "Kyo Grading" and "Dan Grading".

Kyo Grading is a level of expertise in martial aikido that a trainee is granted gradually. Kyo 6 is the first grading for a beginner while Kyo 1 is the last step of level for an amateur learner.

Dan Grading is a level of mastership for a professional aikido player, whose belt's color changes in different dans. Dan 1 is the first grading and dan 8 is regarded as the last step, which is indicated by a black belt.

In Australia and the U.S., these two gradings are divided into under-16 and senior martial art players. The junior aikido learners should pass the courses of 9 levels, receiving belts of different colors.

Due to the vulnerability of their bones, the young adults are not allowed to do the exercises of twisting techniques.

Inner Energy or Ki

As mentioned before, **** chi ***** or **** ki **** is the inborn inner energy of man that the Orient people in particular the Chinese and Japanese believe in.

The center of **** ki **** or according to the Koreans **** gi **** is two inches below the navel from which spreads to other parts of the body.