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URL: http://rjms.iums.ac.ir/article-1-2399-en.html
Background: Changes in load during
asymmetric holding may be associated with particularly high risk of loss of
balance and spinal injury. Therefore, in order to assess occupational lesions
and to make preventive rehabilitation programs in such conditions like holding dynamic
loads in asymmetric postures could be important.
Methods: In a
cross-sectional study, COP amplitude and velocity sway were studied in 14 normal
male volunteers during holding static and dynamic load in symmetric and
asymmetric postures.
Results: Similar Anterior-Posterior responses to the postures were
seen, although asymmetric postures showed a larger Medial-Lateral COP amplitude
and velocity sway
(p<0.05). While dynamic load increased Anterior-Posterior and Medial-Lateral
postural parameters in asymmetric posture (p<0.05), we observed increase
only in Anterior-Posterior direction in symmetric posture (p<0.05).
Conclusion: The results showed that dynamic load challenges the
postural stability control, with a higher effect in asymmetric posture.
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