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Lateral step initiation behavior in older adults.

Patrick J Sparto1, J Richard Jennings2, Joseph M Furman3

  • 1Departments of Physical Therapy, Otolaryngology and Bioengineering, University of Pittsburgh, United States.

Gait & Posture
|December 4, 2013
PubMed
Summary
This summary is machine-generated.

Older adults exhibit diverse postural responses during lateral stepping. A history of falls is linked to more complex stepping strategies and delayed foot liftoff, indicating impaired balance control in aging.

Keywords:
AgingBalanceBiomechanicsFallsPosture

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Area of Science:

  • Gerontology
  • Biomechanics
  • Neuroscience

Background:

  • Older adults display variable postural responses during voluntary lateral stepping.
  • Understanding these responses is crucial for fall prevention strategies.

Purpose of the Study:

  • To quantify different stepping strategies in older adults during lateral step initiation.
  • To correlate these stepping responses with a history of falls.

Main Methods:

  • Seventy older adults performed voluntary lateral steps in response to a visual cue.
  • Vertical ground reaction forces were measured to quantify postural adjustments and latencies.
  • Logistic regression analyzed the relationship between fall history and stepping parameters.

Main Results:

  • Older adults showed a wide distribution (0-100%) in single postural adjustments during lateral steps, unlike younger adults.
  • Stepping strategy varied with the number and latency of postural adjustments.
  • A history of falls correlated with a higher percentage of two postural adjustments and longer foot liftoff latency.

Conclusions:

  • The number and latency of postural adjustments during lateral stepping are key indicators of aging-related postural control.
  • Lateral stepping strategies may serve as a critical marker for assessing fall risk in older adults.