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Updated: Feb 7, 2026

Experimental Methods to Study Human Postural Control
Published on: September 11, 2019
The reliability of postural control method in athletes with and without ACL reconstruction: a transitional task
Forough Ferdowsi1, Azadeh Shadmehr1, Seied Mohsen Mir1
1Physical Therapy Department, School of Rehabilitation, Tehran University of Medical Sciences: Piche Shemiran, Enghelab Street, Tehran, PO Box:1148965141, Iran.
Dynamic postural control assessments using force plates show reliable results in athletes after anterior cruciate ligament reconstruction (ACLR) and healthy individuals. This indicates their utility in evaluating physical function post-injury.
Area of Science:
- Biomechanics
- Sports Medicine
- Rehabilitation
Background:
- Anterior cruciate ligament reconstruction (ACLR) can impact dynamic postural control.
- Reliable assessment tools are crucial for evaluating physical function in athletes post-ACLR.
Purpose of the Study:
- To determine the intra- and inter-session reliability of dynamic postural control measures.
- To compare reliability between athletes with ACLR and matched healthy controls.
Main Methods:
- Utilized force plate technology to assess postural control during a dynamic task (double-leg stance to single-leg stance).
- Included 20 athletes with ACLR and 20 healthy matched controls.
- Measured center of pressure (COP) displacement, area, and mean velocity.
Main Results:
- Moderate to very high reliability (ICC values ranging from 0.64 to 0.98) was observed for various balance measures.
- High reliability was consistently found for range of sway (sideways and fore-aft) and mean velocity in both ACLR and healthy groups.
- COP area also demonstrated moderate to very high reliability across both groups.
Conclusions:
- Force plate measurements of dynamic postural control are reliable in athletes with and without ACLR during transitional tasks.
- These reliable measures can be incorporated into the physical function evaluation of athletes following ACLR.
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