Abstract
The purpose of this study is to establish the measurement system that enables easily kinematics analysis of lower limb of baseball batting form and to evaluate its kinematics. The measurement system consists of the 6-axis force sensor that measures reaction force from the fields, 3-axis gyro sensor and 3-axis acceleration sensor to obtain the movement data of lower limb. We can obtain the angular velocity of joint and reaction force by using this measurement system, and estimate the joint torque of pivoting foot from inverse dynamics analysis using Newton-Euler formulation. It is found that the joint torque of pivoting foot clarifies the difference between experiences and beginners. Therefore, this measurement system can analyze the major features of pivoting foot in baseball batting and this method may be able to quantitatively evaluate the skill of the batting.
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