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Spatiotemporal variability underlying skill in curved-path walking.

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Greater stride width variability (SWV) and step length variability (SLV) in older adults are linked to better curved path walking ability. These findings highlight the importance of practicing stride adjustments for improved mobility and fall prevention in seniors.

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Area of Science:

  • Gerontology
  • Biomechanics
  • Motor Control

Background:

  • Daily walking often involves navigating curved paths, a common yet complex motor task.
  • While average gait patterns on curves are known, spatiotemporal variability during curved walking in older adults remains understudied.
  • Understanding this variability is crucial for assessing and improving walking ability in the elderly.

Purpose of the Study:

  • To investigate the relationship between spatiotemporal variability during curved path walking and the ability to perform this task in community-dwelling older adults.
  • To determine if greater variability in gait parameters is associated with better curved path walking performance.

Main Methods:

  • Thirty-four community-dwelling older adults performed the Figure-of-8 Walk Test (F8W) on an instrumented walkway.
  • Spatiotemporal variability measures, including step length variability (SLV) and stride width variability (SWV), were calculated.
  • Statistical analyses, including correlations and regressions, examined the association between variability measures and F8W performance.

Main Results:

  • Both SLV and SWV were negatively associated with F8W time and the number of steps required, indicating better performance with greater variability.
  • SWV showed a particularly strong negative association (r's = -0.67 to -0.82, p < 0.001) with F8W performance.
  • Both SLV and SWV independently contributed to F8W performance, with SWV being a significant predictor (βs = -0.74 to -0.76, p < 0.001).

Conclusions:

  • Increased spatial variability, especially in stride width, is associated with enhanced motor skill in curved path walking among older adults.
  • These findings suggest that clinicians should consider variability measures as targets for rehabilitation interventions aimed at improving complex walking tasks.
  • Practicing adjustments in stride width and step length may be beneficial for improving curved path walking ability in older populations.