Science and Research Branch, Islamic Azad University, Tehran, Iran.
J Sport Rehabil. 2011 Nov;20(4):442-56. doi: 10.1123/jsr.20.4.442.
Although reliability is a population-specific property, few studies have investigated the measurement error associated with force-platform parameters in athletic populations.
To investigate the skill-related differences between athletes and nonathletes in reliability of center-of-pressure (COP) summary measures under eyes-open (EO) and eyes-closed (EC) conditions.
Test-retest reliability study.
COP was recorded during double-leg quiet standing on a Kistler force platform before and after a fatiguing treadmill exercise, with EO and EC.
31 male participants including 15 athletes practiced in karate and 16 nonathletes.
Standard deviation (SD) of amplitude, phase-plane portrait, SD of velocity, mean total velocity, and area were calculated from 30-s COP data. Intraclass correlation coefficient (ICC), standard error of measurement, and coefficient of variation (CV) were used as estimates of reliability and precision.
Higher ICCs were found for COP measures in the athlete (compared with the nonathlete) group, postfatigued (compared with prefatigued) condition, and EC (compared with EO) tests. CVs smaller than 15% were obtained for most of the COP measures. SD of velocity in the anteroposterior direction showed the highest reliability in most conditions.
Tests with EC and to a lesser extent tests performed in the athlete group and in the postfatigued condition showed better reliability.
虽然可靠性是特定于人群的属性，但很少有研究调查与运动人群中的力台参数相关的测量误差。
研究在睁眼（EO）和闭眼（EC）条件下，运动员和非运动员在中心压力（COP）总结测量的可靠性方面的技能相关差异。
测试-重测可靠性研究。
在疲劳跑步机运动前后，使用 Kistler 力台在双腿静立期间记录 COP，同时进行 EO 和 EC。
31 名男性参与者，包括 15 名练习空手道的运动员和 16 名非运动员。
从 30 秒的 COP 数据中计算出幅度的标准差（SD）、相平面肖像、速度的 SD、平均总速度和面积。使用组内相关系数（ICC）、测量误差的标准误差和变异系数（CV）来估计可靠性和精度。
在疲劳后（与疲劳前相比）和 EC（与 EO 相比）测试中，运动员（与非运动员相比）组的 COP 测量值的 ICC 更高。CV 小于 15%，大多数 COP 测量值的 CV 都较小。在大多数条件下，后前方向的速度的 SD 显示出最高的可靠性。
EC 测试以及在运动员组和疲劳后条件下进行的测试表现出更好的可靠性。
