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Test-Retest Reliability of a Neuromuscular-Cognitive Assessment Battery, Without and With a Rucksack.

Ke'La H Porter1, Molly Taylor1, Danielle M Torp1

  • 1Sports Medicine Research Institute, University of Kentucky, Lexington, KY 40506, United States.

Military Medicine
|October 15, 2025
PubMed
Summary
This summary is machine-generated.

This study found good test-retest reliability for neuromuscular-cognitive assessments in military personnel, with and without a rucksack. Some measures showed variability, requiring careful interpretation for readiness evaluations.

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Area of Science:

  • Sports Medicine
  • Human Performance
  • Military Science

Background:

  • Military personnel operate in unpredictable environments requiring integrated physical and cognitive function.
  • Current readiness assessments do not fully capture performance under such constraints.
  • Assessing neuromuscular-cognitive performance is crucial for understanding responses to uncertainty.

Purpose of the Study:

  • To determine the test-retest reliability of three neuromuscular-cognitive assessments.
  • To evaluate these assessments with and without a 45-pound rucksack.
  • To inform readiness and return-to-duty evaluations for military personnel.

Main Methods:

  • Employed a test-retest reliability study design.
  • Utilized single leg memory hop (SLMH), run decide (RD), and reactive agility (RA) assessments.
  • Measured reaction time, hop distance, postural stability, decision making time, and linear acceleration using an IMU, with and without a rucksack.

Main Results:

  • Good agreement between test sessions was observed for most variables, including SLMH, RD, and RA.
  • Some variables, such as SLMH reaction time and postural stability, showed less consistent agreement.
  • Bland-Altman analysis and Lin's Concordance Correlation Coefficients (CCC) were used to assess reliability.

Conclusions:

  • Neuromuscular-cognitive assessments demonstrate good test-retest reliability in military personnel, with or without a rucksack.
  • Variability in specific measures necessitates careful consideration during clinical interpretation.
  • These findings support the integration of such assessments into military readiness protocols.