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Related Experiment Video

Updated: Dec 4, 2025

Evaluating Postural Control and Lower-extremity Muscle Activation in Individuals with Chronic Ankle Instability
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Evaluation of Postural Stability Differences in the Elderly Through Recurrent Analysis.

Michaela Hourova1, Patrik Kutilek1, Jan Hejda1

  • 1Faculty of Biomedical Engineering, Czech Technical University in Prague, Sitna sq. 3105 Kladno, Czech Republic.

Studies in Health Technology and Informatics
|October 22, 2020
PubMed
Summary

Postural stability declines with age, especially in overweight elderly women. Recurrent Quantification analysis reveals significant age-related changes in center of pressure (CoP) dynamics for overweight individuals, but not for normal weight ones.

Keywords:
AgeBody mass indexCenter of pressureElderlyNonlinear methodPostural stabilityRecurrent analysis

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Area of Science:

  • Gerontology
  • Biomechanics
  • Nonlinear Dynamics

Background:

  • Center of pressure (CoP) measurement on force plates is standard for balance assessment.
  • Aging, particularly after 60, is linked to reduced body stability.
  • Previous studies often lack systematic nonlinear analysis of CoP parameters and BMI considerations.

Purpose of the Study:

  • To evaluate the applicability of Recurrent Quantification analysis for assessing age-related changes in postural stability.
  • To investigate how body mass index (BMI) influences age-related changes in CoP movement.
  • To analyze the progression of CoP parameters using nonlinear methods in elderly women.

Main Methods:

  • Employed Recurrent Quantification analysis (RQA) on center of pressure (CoP) data.
  • Analyzed CoP motion in medial-lateral and anterior-posterior directions.
  • Utilized determinism (DET), laminarity (LAM), and trapping time (TT) parameters from RQA.
  • Compared data from 103 elderly women (60-69 and 70-79 years) stratified by BMI (normal vs. overweight).

Main Results:

  • Statistically significant differences in RQA parameters were found between age groups in overweight subjects.
  • Overweight elderly women showed more pronounced age-related changes in postural stability indicators.
  • Significant age-group differences were infrequent in the normal BMI subgroup.

Conclusions:

  • Recurrent Quantification analysis is a valuable tool for detecting subtle age-related declines in postural stability.
  • Overweight status exacerbates age-related postural instability in elderly women.
  • Nonlinear analysis of CoP dynamics, considering BMI, provides deeper insights into balance changes with aging.