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Updated: Apr 18, 2026

Video Movement Analysis Using Smartphones ViMAS: A Pilot Study
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Validity and Intrarater Reliability of 2-Dimensional Motion Analysis Using a Handheld Tablet Compared to Traditional

Barbara C Belyea1, Ethan Lewis, Zachary Gabor

  • 1Ithaca College, Ithaca, New York.

Journal of Sport Rehabilitation
|January 23, 2015
PubMed
Summary
This summary is machine-generated.

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A tablet app can reliably assess lower extremity joint alignment during jumps, aiding clinicians in evaluating movement patterns for injury prevention. This accessible technology offers a practical tool for sports medicine specialists.

Area of Science:

  • Biomechanics and Movement Analysis
  • Sports Medicine Technology
  • Clinical Assessment Tools

Background:

  • Lower extremity landing mechanics are linked to knee pain and injury.
  • Clinically accessible and cost-effective movement evaluation methods are limited.
  • Valid and reliable technology for assessing lower extremity alignment is needed.

Purpose of the Study:

  • To determine the validity and reliability of using a tablet with a movement analysis application.
  • To assess lower extremity alignment during a drop vertical jump task.

Main Methods:

  • Concurrent validation study in a laboratory setting.
  • Twenty-two healthy college-aged subjects performed drop vertical jumps.
  • Simultaneous recording using 3D motion capture and a tablet with a movement analysis app.
Keywords:
kinematicslower extremitylandinginjury prevention

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Main Results:

  • Significant correlations (r=0.48 to r=0.77) were found between tablet and 3D measures for select ranges of motion and angles at maximum knee flexion.
  • The tablet and app demonstrated reliability for specific joint alignments.

Conclusions:

  • A tablet and app can reliably assess select lower extremity joint alignments during drop vertical jumps.
  • This technology is suitable for evaluating movement patterns but not for measuring absolute joint angles.
  • Sports medicine specialists can use tablets for reliable on-field or in-clinic movement pattern assessment.