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Related Experiment Video

Updated: May 14, 2026

Evaluating Postural Control and Lower-extremity Muscle Activation in Individuals with Chronic Ankle Instability
07:52

Evaluating Postural Control and Lower-extremity Muscle Activation in Individuals with Chronic Ankle Instability

Published on: September 18, 2020

Dynamic postural stability for double-leg drop landing.

Wenxin Niu1, Ming Zhang, Yubo Fan

  • 1Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, Beijing, China.

Journal of Sports Sciences
|January 29, 2013
PubMed
Summary
This summary is machine-generated.

Dynamic postural stability during double-leg landing is robust, with muscle activity enhancing stability as drop height increases. The body may sustain injury before stability is compromised, informing protective strategies.

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Area of Science:

  • Biomechanics
  • Human Movement Science
  • Sports Medicine

Background:

  • Dynamic postural stability is crucial for landing mechanics.
  • Research has primarily focused on single-leg landings, neglecting double-leg landings.
  • Understanding stability during double-leg landings informs injury prevention and training.

Purpose of the Study:

  • To evaluate dynamic postural stability during double-leg drop landings.
  • To investigate the influence of muscle activity on stability during these landings.
  • To compare stability across different drop heights and between genders.

Main Methods:

  • Participants: 8 males, 8 females (recreationally active).
  • Procedure: Double-leg drop landings from 0.32m, 0.52m, 0.72m.
  • Measurements: Ground reaction forces (for time to stabilization) and lower-extremity muscle electromyography.

Main Results:

  • No significant differences in time to stabilization between genders or limb laterals.
  • Increasing drop height significantly decreased time to stabilization in horizontal directions.
  • Lower-extremity muscle activity increased with drop height; vertical time to stabilization was unaffected.

Conclusions:

  • Double-leg landing is inherently stable, with neuromuscular adaptations enhancing stability.
  • The body's injury threshold may be reached before dynamic postural stability is significantly impaired.
  • Findings can inform the design of protective equipment and athlete training protocols.