The Effect of Obstacle Height on Balance Control While Stepping Over an Obstacle From a Position of Quiet Stance in Older Adults

노인의 정적인 자세로부터 장애물 보행 시 장애물 높이의 변화가 평형감각에 미치는 효과

  • Kim, Hyeong-Dong (Department of Physical Therapy, College of Health Science, Catholic University of Daegu)
  • 김형동 (대구가톨릭대학교 물리치료학과)
  • Received : 2009.03.25
  • Accepted : 2009.08.29
  • Published : 2009.09.25

Abstract

Purpose: The purpose of this study was to examine the effect of an obstacle height on the balance control of older adults while stepping over an obstacle from a position of quiet stance. Methods: Fifteen community-dwelling healthy older adults (mean age, $74.4\pm4.27$ yrs; age range, 67-82 yrs) volunteered to participate in this study. The subjects performed gait initiation (GI) and they stepped over obstacles of two different heights (10 cm and 18 cm) at a self-paced speed from a position of quiet stance. Their performance was assessed by recording the changes in the displacement of the COP in the anteroposterior (A-P) and mediolateral (M-L) directions using a force platform. Results: The M-L displacement of the COP significantly increased for an 18 cm obstacle height condition as compared to the GI and a 10 cm obstacle height condition (p<0.01). Furthermore, the M-L displacement of the COP for a 10 cm high obstacle was significantly greater for that for the GI (p<0.01). However, the mean of the A-P displacement of the COP was similar between the stepping conditions for the A-P displacement of the COP (p>0.05). Conclusion: This study suggests that the M-L COP displacement could be a better parameter to identify the dynamic balance control in older adults when negotiating obstacles.

Keywords

References

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