CONTEXT: Although reliability is a population-specific property, few studies have investigated the measurement error associated with force-platform parameters in athletic populations. OBJECTIVE: 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. DESIGN: Test-retest reliability study. SETTING: COP was recorded during double-leg quiet standing on a Kistler force platform before and after a fatiguing treadmill exercise, with EO and EC. PARTICIPANTS: 31 male participants including 15 athletes practiced in karate and 16 nonathletes. MAIN OUTCOME MEASURES: 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. RESULTS: 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. CONCLUSIONS: Tests with EC and to a lesser extent tests performed in the athlete group and in the postfatigued condition showed better reliability.
CONTEXT: Although reliability is a population-specific property, few studies have investigated the measurement error associated with force-platform parameters in athletic populations. OBJECTIVE: 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. DESIGN: Test-retest reliability study. SETTING: COP was recorded during double-leg quiet standing on a Kistler force platform before and after a fatiguing treadmill exercise, with EO and EC. PARTICIPANTS: 31 male participants including 15 athletes practiced in karate and 16 nonathletes. MAIN OUTCOME MEASURES: 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. RESULTS: 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. CONCLUSIONS: Tests with EC and to a lesser extent tests performed in the athlete group and in the postfatigued condition showed better reliability.
Authors: Camille J Shanahan; Frederique M C Boonstra; L Eduardo Cofré Lizama; Myrte Strik; Bradford A Moffat; Fary Khan; Trevor J Kilpatrick; Anneke van der Walt; Mary P Galea; Scott C Kolbe Journal: Front Neurol Date: 2018-02-02 Impact factor: 4.003
Authors: Daniela Ohlendorf; Christoph Mickel; Natalie Filmann; Eileen M Wanke; David A Groneberg Journal: J Occup Med Toxicol Date: 2016-07-16 Impact factor: 2.646