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Related Experiment Video

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Lower Limb Biomechanical Analysis of Healthy Participants
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Determining Trendelenburg test validity and reliability using 3-dimensional motion analysis and muscle dynamometry.

Luke McCarney1, Alexander Andrews2, Phoebe Henry2

  • 1Osteopathy, School of Health and Biomedical Sciences, RMIT University, Bundoora, VIC, 3083, Australia.

Chiropractic & Manual Therapies
|October 20, 2020
PubMed
Summary

The Trendelenburg test shows poor validity for assessing hip abductor weakness in individuals without hip disorders. Clinical assessment agreement was weak, suggesting caution when using this test.

Keywords:
BiomechanicsHipMuscle strengthTrendelenburg testVicon

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Area of Science:

  • Biomechanics and Musculoskeletal Health
  • Clinical Assessment Validity
  • Diagnostic Accuracy in Physical Therapy

Background:

  • The hip abductor muscles are crucial for pelvic stability during gait.
  • Weakness in these muscles is associated with chronic low-back pain.
  • Accurate clinical diagnosis of hip abductor weakness is essential.

Purpose of the Study:

  • To evaluate the validity of the Trendelenburg test for assessing hip abductor strength.
  • To determine the test's accuracy in measuring pelvic motion without hip pathology.
  • To compare practitioner assessment with objective 3D motion analysis.

Main Methods:

  • Eighteen participants underwent isometric and isokinetic hip abductor torque testing.
  • The Trendelenburg test was performed bilaterally, assessed by a chiropractic practitioner.
  • 3D motion capture analyzed frontal plane pelvic motion and elevation simultaneously.

Main Results:

  • Weak, often non-significant, correlations were found between hip abductor strength and pelvic motion.
  • Agreement between practitioner assessment and 3D analysis was poor (κ = 0.22–0.25).
  • No significant relationship was found between hip abductor torque and pelvic motion.

Conclusions:

  • The Trendelenburg test has questionable validity for assessing hip abductor weakness in healthy adults.
  • Practitioner assessment showed poor agreement with objective measures of pelvic motion.
  • Further research with larger sample sizes is recommended to confirm these findings.