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Related Experiment Videos

Stride-to-stride variability while backward counting among healthy young adults.

Olivier Beauchet1, Véronique Dubost, François R Herrmann

  • 1Laboratory of Physiology and Physiopathology of Exercise and Handicap, Faculty of Medicine, University of Saint-Etienne, France. olivier.beauchet@hcuge.ch

Journal of Neuroengineering and Rehabilitation
|August 13, 2005
PubMed
Summary

Dual tasking, like backward counting while walking, slightly decreases stride velocity and increases stride time variability in young adults. This suggests minimal attention is needed for rhythmic stepping control during gait.

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Area of Science:

  • Neuroscience
  • Biomechanics
  • Human Factors

Background:

  • Gait rhythmicity control and its relation to stride variability are not well understood.
  • The role of attention in gait control requires further investigation.

Purpose of the Study:

  • To assess gait changes (mean values and variability) in young adults during dual-tasking (walking while backward counting).
  • To determine if gait variability changes relate to dual-tasking, attention, or gait velocity changes.

Main Methods:

  • 49 healthy young adults walked alone and while backward counting.
  • Stride velocity, stride time, and stride length variability were measured using the Physilog-system.
  • Backward counting performance was assessed during both conditions.

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Main Results:

  • Dual-tasking significantly decreased mean stride velocity and increased mean stride time and stride time variability.
  • Stride length parameters remained unchanged.
  • Backward counting performance decreased significantly during dual-tasking, more so than stride velocity.

Conclusions:

  • Walking involves attention-demanding aspects in young adults.
  • Dual-tasking led to minor decreases in stride velocity and slight increases in stride time variability.
  • Increased stride time variability was linked to gait speed changes, not directly to dual-tasking, suggesting minimal attention is needed for rhythmic stepping.