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Related Experiment Videos

Does the functional reach test reflect stability limits in elderly people?

Erika Jonsson1, Marketta Henriksson, Helga Hirschfeld

  • 1Motor Control and Physical Therapy Research Laboratory, Division of Physiotherapy, Neurotec Department, Karolinska Institutet, Stockholm, Sweden.

Journal of Rehabilitation Medicine
|March 4, 2003
PubMed
Summary

The Functional Reach test weakly measures stability limits in older adults. Trunk movement, not center of pressure displacement, significantly impacts test results, highlighting the need to consider compensatory mechanisms.

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Area of Science:

  • Gerontology
  • Biomechanics
  • Kinesiology

Background:

  • The Functional Reach test is commonly used to assess balance in elderly individuals.
  • Understanding its correlation with objective measures of stability is crucial for accurate assessment.

Purpose of the Study:

  • To investigate the relationship between the Functional Reach test and center of pressure displacement.
  • To evaluate the Functional Reach test as a measure of stability limits in healthy older adults.
  • To analyze performance parameters during the Functional Reach test.

Main Methods:

  • A method comparison study involving 27 healthy elderly subjects.
  • Utilized whole-body kinematics, ground reaction forces, and electromyography (EMG) alongside the Functional Reach test.

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  • Collected data on movement patterns and muscle activity during the test.

    • Main Results:

    • A low correlation (r=0.38) was found between reach distance and center of pressure displacement.
    • A moderate correlation (r=0.68) existed between trunk forward rotation and reach distance.
    • The Functional Reach test movement was characterized by significant trunk rotation and minimal ankle extension, limiting center of pressure displacement.

    Conclusions:

    • The Functional Reach test appears to be a limited measure of stability limits.
    • Trunk movement plays a more significant role than center of pressure displacement in the test outcome.
    • Compensatory mechanisms must be considered when interpreting Functional Reach test results for balance assessment.