This study examined the relationship between changes in an individual's condition and sway pattern changes using four body sway factors: unit time sway, frontback sway, left-right sway and the high frequency band power. Each subject's sway pattern was determined according to the procedure reported in our previous study. Because respective factors were divided into 7 domains which consist of 4 main (A, B1, B2 and C) and 3 boundary (ab, bb and bc) domains, factor scores for each individual were ranked in any of the above domains and their sway pattern, based on the 4 sway factors, was decided. Measurement of the center of foot pressure (CFP) and examination of the conscious condition were conducted on 10 subjects for 100 days. The CFP was twice each day measured for 1 min, with a 1 min rest between measurements. The measurement device was an Anima's stabilometer G5500. The data sampling frequency was 20 Hz. We identified the sway pattern when each subject felt comfortable that they were performing their standard pattern. It was clarified that the standard pattern differs for each individual; subjects have respective unique patterns, and the sway patterns under normal conditions are mostly similar to the standard pattern. Meanwhile, sway patterns under abnormal conditions were considered to differ from the standard pattern. When a person feels in an abnormal condition or experiences somewhat of a change in the inner body, this may be reflected in their sway pattern. In addition, it was suggested that even under abnormal conditions, sway patterns under cold and myalgia conditions differ. The evaluation method of sway pattern proposed in our previous study can simply evaluate an individual's conscious body change or abnormal con-dition, and may be useful in health care.
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