Fig 1.
Subject secured to a harness standing on the unstable board placed over the force platform (a); detail of the force platform and the unstable board during medio-lateral (b) and anterior-posterior (c) dynamic tests.
Fig 2.
Graphical representation of the kinematic parameters (i.e., Full Balance, Gross Balance, and Fine Balance) in a representative AP trial.
Full balance is the area below the rectified raw signal and is represented in grey. Gross Balance is the total time the raw signal stays between +10deg and -10deg, represented in blue. Fine Balance is the total time the raw signal stays between +5deg and -5deg, represented in red.
Table 1.
Mean values, group means (GM), and standard deviations (SDs) of the CoP-related parameters (Area95 and Unit Path) during the unstable board test (DAY1) performances.
Table 2.
Mean values, group means (GM), and standard deviations (SDs) of the kinematic parameters (Full balance, Fine Balance, and Gross Balance) during the unstable board test (DAY 1) and retest (DAY 2) performances.
Table 3.
Mean values, group means (GM), and standard deviations (SDs) of the kinematic parameters (Full balance, Fine Balance, and Gross Balance) during the unstable board test (DAY 1) and retest (DAY 2) performances.
The Total Dynamic Score (TDS) was calculated for each subject averaging the ten AP and ML trials.
Table 4.
Pearson correlations between CoP-related parameters (Area95 and Unit path) derived from the force platform and kinematic parameters (Full balance, Fine balance, and Gross balance) obtained from the instrumented balance board.
Table 5.
Average intersession [3,1] intraclass correlation coefficient (ICC) and 95% Confidence Intervals (95% CI), Standard Error of the measurement (SEm), and Minimal Detectable Change (MD95) calculated during the performances on the unstable board.
Table 6.
Average intrasession [3, 10] intraclass correlation coefficient (ICC) and 95% Confidence Intervals (95% CI), Standard Error of the measurement (SEm), and Minimal Detectable Change (MD95) calculated during the performances on the unstable board.
Fig 3.
Bland-Altman plot for Full Balance, Gross Balance, and Fine Balance parameters in the anterior-posterior, medio-lateral, and TDS conditions.
Differences between test and retest scores are plotted against their means. The black line indicates the average of the differences, whereas the dotted ones represent the 95% limits of agreement.