Demura Shinichi, Kitabayashi Tamotsu, Noda Masahiro
Graduate School of Natural Science and Technology, Kanazawa University, Japan.
Percept Mot Skills. 2008 Feb;106(1):307-16. doi: 10.2466/pms.106.1.307-316.
This study assessed sex and individual differences in sway-position and velocity power spectra and reliability of power frequency with 30 health young people. The body sway for 1 min. was measured twice over a 1-min. rest. There were no significant sex differences in the spectra. Frequency bands with a large coefficient of variance over 10.0 appeared up to 0.6 Hz. 75% relative accumulated power frequency appeared at 1.10-1.23 Hz in the position and at 2.00-3.05 Hz in the velocity spectra. Most power was in the low frequency band (A and B frequency intervals) of the international standard. Relative accumulated power frequency of position and velocity power spectra was reasonably reliable. It may be necessary to establish a new evaluation frequency interval by direction of sway-position and velocity using relative accumulated power frequency for healthy people.
本研究评估了30名健康年轻人在摇摆位置和速度功率谱方面的性别和个体差异以及功率频率的可靠性。在1分钟的休息时间内，对身体摇摆进行了1分钟的两次测量。频谱中没有显著的性别差异。方差系数超过10.0的频段在0.6赫兹以下出现。75%的相对累积功率频率在位置频谱中出现在1.10 - 1.23赫兹，在速度频谱中出现在2.00 - 3.05赫兹。大部分功率处于国际标准的低频带（A和B频率区间）。位置和速度功率谱的相对累积功率频率具有合理的可靠性。对于健康人群，可能有必要根据摇摆位置和速度的方向，利用相对累积功率频率建立新的评估频率区间。
