Test-Retest Reliability of a Novel Force Control Task in a Healthy Population
Presenter Type
UNO Graduate Student (Masters)
Major/Field of Study
Biomechanics
Other
Biomechanics
Author ORCID Identifier
https://orcid.org/0009-0002-4277-5675
Advisor Information
Brian Knarr
Location
MBSC Ballroom Poster # 108 - G (Masters)
Presentation Type
Poster
Start Date
24-3-2023 2:30 PM
End Date
24-3-2023 3:45 PM
Abstract
Anterior cruciate ligament (ACL) injuries commonly occur through noncontact maneuvers, suggesting a deficit in neuromuscular control. There exists a methodology to detect these deficits that utilizes shear force control and nonlinear analysis, specifically the largest Lyapunov exponent (LyE). Previously, this force control task has been used to compare the control strategies among uninjured recreational athletes, uninjured high-performance athletes, those with ACL injury who had not undergone reconstruction (ACLD), and those with ACL injury who had undergone reconstruction (ACLR). A baseline measure with a healthy population would show the effectiveness of the LyE and demonstrate test-retest reliability with this method. The purpose of this study was to determine the test-retest reliability of the novel force control task. Twelve healthy young adults participated in the study. The participants stood on force plates and generated forces bi-directionally to the beat of a metronome. These forces correlated to a moving bar displayed on a screen in front of the participant. The participants tried to align the moving bar with stationary indicators at each sound from the metronome. The stationary indicators represented 50% of the participant’s maximum strength in that direction. The force profiles obtained from two sessions, which occurred one week apart, were used in the calculation of the LyE. The reliability of the LyE from the best trials at each session was evaluated using interclass correlation coefficients (ICC) for a two-way random effects model for consistency of a single rating. Overall, the ICC for each condition fell within 0.55 to 0.75. These results suggest that the force control task has moderate reliability.
Scheduling
9:15-10:30 a.m., 10:45 a.m.-Noon, 1-2:15 p.m., 2:30 -3:45 p.m.
Test-Retest Reliability of a Novel Force Control Task in a Healthy Population
MBSC Ballroom Poster # 108 - G (Masters)
Anterior cruciate ligament (ACL) injuries commonly occur through noncontact maneuvers, suggesting a deficit in neuromuscular control. There exists a methodology to detect these deficits that utilizes shear force control and nonlinear analysis, specifically the largest Lyapunov exponent (LyE). Previously, this force control task has been used to compare the control strategies among uninjured recreational athletes, uninjured high-performance athletes, those with ACL injury who had not undergone reconstruction (ACLD), and those with ACL injury who had undergone reconstruction (ACLR). A baseline measure with a healthy population would show the effectiveness of the LyE and demonstrate test-retest reliability with this method. The purpose of this study was to determine the test-retest reliability of the novel force control task. Twelve healthy young adults participated in the study. The participants stood on force plates and generated forces bi-directionally to the beat of a metronome. These forces correlated to a moving bar displayed on a screen in front of the participant. The participants tried to align the moving bar with stationary indicators at each sound from the metronome. The stationary indicators represented 50% of the participant’s maximum strength in that direction. The force profiles obtained from two sessions, which occurred one week apart, were used in the calculation of the LyE. The reliability of the LyE from the best trials at each session was evaluated using interclass correlation coefficients (ICC) for a two-way random effects model for consistency of a single rating. Overall, the ICC for each condition fell within 0.55 to 0.75. These results suggest that the force control task has moderate reliability.