Discrimination of throwing motion using a measuring system of bioelectrical impedance with high time resolution

2014 Fiscal Year Final Research Report

• Project/Area Number: 24650386
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Sports science
• Research Institution: Okayama University
• Principal Investigator: NAKAMURA Takao 岡山大学, 保健学研究科, 准教授 (00249856)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: インピーダンス / 高時間分解能 / Cole-Cole円弧 / 投球動作 / 判別分析

Outline of Final Research Achievements

We have developed a measuring system of frequency characteristics of bioelectrical impedance with high time resolution and proposed the discrimination method for six forearm motions. The purpose of this research was discrimination of throwing motion of baseball. The four throwing motions were as follows: ① natural pronation, ② excessive pronation, ③ excessive spination and ④ hyperextension of elbow. In order to obtain higher hitting ratio of discrimination of four throwing motion, the optimal potential electrode location were the wrist joint side of a flexor carpi radialis muscle and 25 parameters of impedance parameters during throwing were used. As the results, the 96.7% of hitting ratio were obtained in 120 throwings of three subjects.

Free Research Field

医用生体工学