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Related Experiment Video

Updated: Aug 14, 2025

Experimental Methods to Study Human Postural Control
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Lifespan changes in postural control.

Nathan Van Humbeeck1, Reinhold Kliegl2, Ralf T Krampe3

  • 1Brain and Cognition Group, University of Leuven (KU Leuven), Leuven, Belgium. nathan.vanhumbeeck@kuleuven.be.

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Postural control declines with age, showing an inverted U-shape. Older adults exhibit distinct short-term control deficits but compensate with long-term adjustments, unlike children.

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Area of Science:

  • Human movement science
  • Gerontology
  • Developmental psychology

Background:

  • Postural control exhibits an inverted U-shaped lifespan trajectory, with peak performance in young adulthood.
  • Children and older adults show similar underperformance, but the underlying control mechanisms may differ.
  • Understanding age-related changes in postural control is crucial for fall prevention and maintaining independence.

Purpose of the Study:

  • To investigate age-related differences in postural control mechanisms across the lifespan.
  • To compare postural control strategies between children and older adults under varying sensory and stability demands.
  • To re-evaluate existing postural control frameworks based on novel findings from stabilogram diffusion analysis.

Main Methods:

  • Collected center-of-pressure (CoP) trajectory data from 299 participants aged 7–81 years.
  • Assessed postural control in three tasks: stable stance, compromised vision, and narrowed base of support.
  • Utilized stabilogram diffusion analysis (SDA) to quantify short-term (drift) and long-term (diffusion) postural control dynamics.

Main Results:

  • Summary statistics confirmed the inverted U-shape, with older adults more affected by visual and base-of-support challenges than children.
  • SDA revealed greater short-term postural sway (drift) in older adults, particularly under challenging conditions.
  • Older adults demonstrated compensatory long-term diffusion and earlier anti-persistent behavior in tandem stance compared to children.

Conclusions:

  • Age-related postural control deficits are not uniform, with older adults employing distinct compensatory strategies.
  • The postural control system demonstrates significant adaptability throughout the lifespan.
  • Findings necessitate a reinterpretation of current postural control models to account for age-specific adaptations.