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Postural Organization of Gait Initiation for Biomechanical Analysis Using Force Platform Recordings
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The Relationship Between Dynamic Stability and Multidirectional Speed.

Robert G Lockie1, Adrian B Schultz, Samuel J Callaghan

  • 1Exercise and Sport Science Department, School of Environmental and Life Sciences, University of Newcastle, Ourimbah, Australia.

Journal of Strength and Conditioning Research
|August 15, 2013
PubMed
Summary
This summary is machine-generated.

Dynamic stability, measured by functional reaching, is linked to multidirectional speed in athletes. Improved stability, particularly in specific leg movements, correlates with faster sprint and change-of-direction times.

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Area of Science:

  • Sports Science
  • Biomechanics
  • Exercise Physiology

Background:

  • Dynamic stability is theorized to enhance multidirectional speed, but empirical evidence is limited.
  • Multidirectional speed encompasses both linear sprinting and change-of-direction (COD) abilities crucial for field sports.

Purpose of the Study:

  • To investigate the relationship between dynamic stability and multidirectional speed in male field sport athletes.
  • To determine if specific functional reaching measures correlate with performance in linear and COD speed tests.

Main Methods:

  • Sixteen male field sport athletes performed a modified Star Excursion Balance Test (SEBT) to assess dynamic stability via lower-limb functional reaching in six directions.
  • Athletes also completed multidirectional speed assessments, including a 40-m sprint, T-test, and Change-of-Direction and Acceleration Test (CODAT).
  • Statistical analyses included one-way ANOVA to compare groups and Spearman's correlation to assess relationships between dynamic stability and speed metrics.

Main Results:

  • Faster athletes exhibited greater medial reach on the left leg and posteromedial reach on the right leg.
  • A smaller difference in lateral reach between legs was observed in faster athletes, indicating better dynamic stability.
  • Longer reach distances (enhanced dynamic stability) significantly correlated with faster times across various speed tests, especially COD tests (T-test, CODAT).

Conclusions:

  • A significant relationship exists between dynamic stability, as measured by functional reaching, and multidirectional speed in field sport athletes.
  • Improved dynamic stability, characterized by greater reach distances and reduced between-leg asymmetries, is associated with superior performance in linear and COD speed.
  • These findings suggest that dynamic stability training may enhance athletic performance by improving muscle strength and functional joint mobility for multidirectional movements.