Characteristics of Standing Posture in Practitioners of Kendo: Measurement of Swaying Movement of the Body and Center of Foot Pressure

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  • BANDO Takao
    Institute for Higher Education Research and Practice, Osaka University
  • SUGIE Masatoshi
    Institute for Higher Education Research and Practice, Osaka University

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  • 剣道経験者における立位姿勢の特徴について:身体動揺と足圧中心動揺の測定

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From the perspective that standing posture is due to maintenance and regulation of body balance, many studies have used a force plate system to measure center of foot pressure (CFP). However, CET data represent numerical values calculated on the assumption that the entire body is a single object. As the various body segments are connected by joints, swaying of various body segments differs. We therefore contrived and measured swaying movements of the body (SMB) using a laser and corner mirrors system. To the best of our knowledge, no previous study has investigated the posture of practitioners of kendo (kendoists) in terms of SMB and CFP.The objective of the present study was to measure SMB and CFP to clarify the characteristics of standing posture in kendoists. Subjects comprised 30 male university students, with 15kendoists and 15 students who did not exercise regularly (controls). In terms of SMB, mean area of sway of the head, shoulder and knee was significantly lower for kendoists than for controls. In terms of CFP, mean area of sway was significantly lower for kendoists than for controls. Swaying as assessed by SMB or OFF for kendoists was smaller, suggesting that while standing, amount of sway of the entire body is small for kendoists. We suspect that practicing kendo for a long period of time causes kendoists to rely more on somatosensory input to maintain the standing posture.

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