A Study of Body Sway Mechanism in Standing Posture

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To research the Body sway mechanism in standing posture, following experiments were made.1. It was possible to measure the body swey using by the corner-mirror and laser beam system. Standard error of this system was below. 0.0770mm.2. Sway of the center of gravity was measured to 33 male kendoists and 36 controls using a foce plate system. Length and area of the center of gravity locus in kendoists were smaller than those in controls.3. To assess the effects of wearing kendo protectors on balance ability, male kendoists and controls were participated. With wearing kendo protectors, the degree of postural sway in controls was larger than in kendoists, both in conditions of the standing posture and the posture of "chyudan-no-kamae"