Motion discrimination of throwing a baseball using forearm electrical impedance

Takao Nakamura, Toshimasa Kusuhara, Yoshitake Yamamoto

Research output: Contribution to journalConference articlepeer-review

3 Citations (Scopus)


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.

Original languageEnglish
Article number012070
JournalJournal of Physics: Conference Series
Issue number1
Publication statusPublished - 2013
Event15th International Conference on Electrical Bio-Impedance, ICEBI 2013 and 14th Conference on Electrical Impedance Tomography, EIT 2013 - Heilbad Heiligenstadt, Germany
Duration: Apr 22 2013Apr 25 2013

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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