Visual feedback training improves postural adjustments associated with moving obstacle avoidance in elderly women

Gait Posture. 2009 Feb;29(2):296-9. doi: 10.1016/j.gaitpost.2008.09.011. Epub 2008 Nov 7.

Abstract

The study examined the impact of visually guided weight shifting (WS) practice on the postural adjustments evoked by elderly women when avoiding collision with a moving obstacle while standing. Fifty-six healthy elderly women (70.9+/-5.7 years, 87.5+/-9.6 kg) were randomly assigned into one of three groups: a group that completed 12 sessions (25 min, 3s/week) of WS practice in the Anterior/Posterior direction (A/P group, n=20), a group that performed the same practice in the medio/lateral direction (M/L group, n=20) and a control group (n=16). Pre- and post-training, participants were tested in a moving obstacle avoidance task. As a result of practice, postural response onset shifted closer to the time of collision with the obstacle. Side-to-side WS resulted in a reduction of the M/L sway amplitude and an increase of the trunk's velocity during avoidance. It is concluded that visually guided WS practice enhances elderly's ability for on-line visuo-motor processing when avoiding collision eliminating reliance on anticipatory scaling. Specifying the direction of WS seems to be critical for optimizing the transfer of training adaptations.

Publication types

  • Randomized Controlled Trial
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Accidental Falls / prevention & control
  • Adaptation, Physiological / physiology
  • Aged
  • Aged, 80 and over
  • Aging / physiology
  • Feedback*
  • Female
  • Humans
  • Motor Skills
  • Postural Balance / physiology*
  • Psychomotor Performance / physiology
  • Task Performance and Analysis
  • Transfer, Psychology
  • Visual Perception / physiology*