Relationship between the medial longitudinal arch and the thoracic and lumbar curvatures with the static and dynamic stability in obese females

Document Type : Original article

Authors

1 Associate Professor of Physiotherapy, Dept. of Physiotherapy, Faculty of Rehabilitation Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran (corresponding author)

2 MSc in Physiotherapy, Dept. of Physiotherapy, Faculty of Rehabilitation Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran

3 3. Professor of Physiotherapy, Faculty of Rehabilitation Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran

4 Assistant Professor of Physiotherapy, Dept. of Physiotherapy, Faculty of Rehabilitation Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran

Abstract

Background and Aim: Reviewing the literature reveals a possible correlation between the obesity and the potential foot, spine and stability problems. Investigating the important parameters affecting the balance of obese people and prevention from falling are of high importance to reduce the resulting expenditures. This study aimed to assess the acts and the counter acts between the medial longitudinal arch (MLA) and the thoracic and lumbar curvatures with the static and dynamic stability in obese females.
Materials and Methods: Twenty eight obese females (age= 25±8 years old, BMI=37±4) and twenty nine non-obese females (age= 23±4 years old, BMI=23±3) were recruited in this case-control study with the cross-sectional technique. The MLA, spinal curve angles and the static or dynamic balance index of the subjects were measured using the navicular drop, flexible ruler and Biodex balance system tools, respectively. The static balance test was carried out using a modified Clinical Test of Sensory Interaction and Balance (CTSIB) test in both the open and closed eyes while the subjects stood on their dominant legs. The order of the dynamic and static tests was selected randomly.
Results:The findings of this study showed that in closed eye condition, most changes happened between the global Stability Index (SI) and BMI; while in open eye condition, most changes occurred between the lateral-medial stability index and BMI (r=0.5). Also during an open eye condition, a moderate correlation was found between the navicular drop and lateral-medial stability index (r=0.05).  In closed eyes condition, no significant changes were found between the SI and lumbar lordosis (r=0.0004); while a weak correlation was found between the thoracic curve angle and lateral-medial stability index (r=0.04).
Conclusion: The dynamic stability is not only correlated to their BMI, but is highly dependent on their foot curvature types and slightly on their thoracic curve angle. Abdominal obesity always played a significant role in antero-posterior stability index. Lumbar curvature showed a minor effect on static index value. 

Keywords

References

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The Scientific Journal of Rehabilitation Medicine
Volume 1, Issue 2 - Serial Number 2
July and August 2012
Pages 15-22

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History

  • Receive Date: 22 April 2011
  • Revise Date: 13 November 2011
  • Accept Date: 03 April 2012
  • First Publish Date: 21 June 2012

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