Motion discrimination of throwing a baseball using forearm electrical impedance
Motion discrimination of throwing a baseball using forearm electrical impedance
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利用前臂电阻抗进行投掷棒球的运动辨别
DOI：
10.1088/1742-6596/434/1/012070
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
Yoshitake Yamamoto
中科院分区：
文献类型：
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作者：
Takao Nakamura;T. Kusuhara;Yoshitake Yamamoto
肘关节外倾或过度伸展会导致投掷棒球时肘关节紊乱。一种易于操作且客观测量运动的方法可用于评估投掷运动。我们研究了使用电阻抗法进行投掷棒球运动辨别的可能性。测量了四种投掷棒球过程中前臂电阻抗的频率特性（科尔-科尔弧）参数。采用多重判别分析，自变量为前臂电阻抗11个参数的变化率。从三名受试者的四种投掷动作的120个数据的结果来看，命中率非常高，达到95.8%。我们可以期望使用阻抗参数的多重判别分析来判别投掷棒球。
The extroversion or hyperextension of elbow joint cause disorders of elbow joint in throwing a baseball. A method, which is easy handling and to measure motion objectively, can be useful for evaluation of throwing motion. We investigated a possibility of motion discrimination of throwing a baseball using electrical impedance method. The parameters of frequency characteristics (Cole-Cole arc) of forearm electrical impedance were measured during four types of throwing a baseball. Multiple discriminant analysis was used and the independent variables were change ratios of 11 parameters of forearm electrical impedance. As results of 120 data with four types of throwing motion in three subjects, hitting ratio was very high and 95.8%. We can expect to discriminate throwing a baseball using multiple discriminant analysis of impedance parameters.