Test-Retest reliability of performance, knee functionality and movement quality biomechanics in agility T-test using...

Area of Science:

• Biomechanics
• Sports Science
• Human Movement Analysis

Background:

• Agility T-test is a common assessment for athletes.
• Traditional motion capture requires markers, which can be cumbersome.
• Markerless motion capture offers a potentially more convenient alternative.

Purpose of the Study:

• To evaluate the reliability of markerless motion capture for the agility T-test.
• To assess performance, knee functionality, and movement quality parameters.
• To determine the test-retest reliability of these measurements.

Main Methods:

• Seventeen healthy participants completed the agility T-test in two sessions, one week apart.
• Markerless motion capture technology was used for data acquisition.
• Intraclass correlation coefficient (ICC), standard error of measurement (SEM), and minimal detectable change (MDC) were calculated.

Main Results:

• Moderate to good test-retest reliability was found for performance (ICC: 0.65-0.96), knee functionality (ICC: 0.74-0.94), and movement quality (ICC: 0.59-0.90).
• SEM and MDC values provided specific measures of precision and minimal clinically significant changes.
• The findings indicate consistent quantification of biomechanical parameters across sessions.

Conclusions:

• Markerless motion capture demonstrates reliable test-retest performance for the agility T-test.
• This technology shows potential for accurately assessing biomechanical parameters in sports.
• The findings support the use of markerless systems for objective movement analysis.