The agility has long been accepted as one of the motor fitness elements by the majority of researchers, and so far, is the most reliable indicator for the physical fitness evaluation. Although a number of the agility tests have been introduced by various authors, its definition has not yet been clearly made. The purposes of this study were (1) to analyze the agility, (2) establish the detonation most appropriate for describing "General Agility", and finally (3) to propose a new testing device in order to measure the defined general agility of the human body. Several experimental and statistical studies for the various agility tests, for example, Burpee Test, Side Step Test were given in this study other than the proposed JST. The following results were obtained: 1) The general agility was defined as an agility to move the body into multiple directions as fast as possible. 2) The objectivity, reliability and simplicity were higher in J.S.T. than in other tests, and J.S.T. has been found appropriate as an instrument to evaluate the defined "general agility". 3) Norms and classification tables were prepared for the all age groups by sex to be used for tile estimation of the defined agility, and to be one of the indicators for the physical fitness status of the individual.
