We can more effectively take the physical skills of individual people into consideration from various points of view when we focus on evaluating their skills while exercising. We can focus on their maximum levels of speed and power, their smoothness through a series of exercises, their instantaneous force, repeatability, and their adjustability to agitation or obstacles such as circumjacent people or nature. A lot of exercise skills can relatively and easily be quantitatively evaluated by carefully analyzing the results and performance.
However, it is difficult to evaluate the "repeatability" aspect, which is only one of exercise skill, when judging its degree from only viewing the given exercise. An example of a physical exercise process that can contribute stable results would need to be equivalent to a "skill" such as hitting a home run each time. We believe that the acquisition of a given skill is very useful in fields such as physical training. Therefore, we examined the repeatability aspect from this point of view.
We also used an antagonism power index calculated using EMG to achieve such purposes. The index represents any adjustments made in the output power from the muscles. I thought that the adjust function of the output power of the muscles would be very useful when evaluating the exercise skills of a given individual. The antagonism power was calculated using the quasi-muscular tension and a skeletal muscle model consisting of one joint and two muscles. We also made a comparison between the unskilled state and a skilled state. As a result, the differences in exercise skill appeared to be antagonism power. Therefore, we thought that antagonism power was effective enough for creating a new exercise skill evaluation index that we define in this paper.