Velocities and Accelerations of Body Parts during Standing: Association with Visual Information

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Pirjo Kejonen
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Kari Kauranen
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Ahti Niinimaa
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Heikki Vanharanta
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Context:

Balance evaluation and training are typically included in rehabilitation after sport injuries.

Objective:

To evaluate and compare the maximal velocities and accelerations of balancing movements during 2-leg stance with eyes open and closed. The effect of age on the measured values was also evaluated.

Design:

Cross-sectional study.

Participants:

100 healthy, randomly selected subjects (50 men, 50 women; age 31–80 years).

Setting:

Body-movement values were measured with the Mac Reflex motion-analysis system.

Intervention:

Subjects stood barefoot.

Main Outcome Measures:

ANOVAs were used to explain the body movements. The location of measurement, presence or absence of vision, and subjects’ age and gender were used as explanatory variables.

Results:

With eyes closed, all measured body parts had significantly higher maximal velocity and acceleration values than with eyes open. Age seemed to affect the acceleration values.

Conclusion:

Visual information was found to significantly influence movement values. Exercises should be done under various conditions to improve standing balance abilities.

Kejonen, Kauranen, and Vanharanta are with the Dept of Physical Medicine and Rehabilitation, Oulu University Hospital, 90029 OYS, Oulu, Finland. Niinimaa is with the Institute of Dentistry, University of Oulu, Oulu, Finland.

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