The purpose of this study was to investigate foot pressure distribution patterns quantitatively while walking in individuals with Anterior Cruciate Ligament (ACL) injury by using parameters calculated on the basis of centre of pressure (COP) traces.
24 unilateral chronic ACL-deficient patients hospitalised for ACL reconstruction surgery were enrolled for the study.
The dominant leg was defined as the leg with which the patient usually kicked a ball.
The ACL-deficient group was divided into ‘dominant side’ and ‘nondominant side’ groups.
Patients walked along a walkway three times, and then the F-Scan measurement was performed.
In the ACL-deficient group, all 24 patients injured their ACL during noncontact sports such as basketball, volleyball, handball, and baseball or during noncontact events requiring sudden turns or jumps in activities of daily living.
The three parameters used in this study were %COP (ratio of anteroposterior COP path length to foot length), %CLA (ratio of the area encompassed by the COP path and a line between the start and end points of the COP path to the plantar contact area) and MACOP (the maximum perpendicular length from the COP path to a line between the start and end points of the COP).
When the anteroposterior length of the COP path was short, there was difficulty of COP movement from heel to hallux, making it difficult for ACL-deficient patients with nondominant side injuries to move the COP smoothly compared with healthy individuals.
The three parameters enabled the authors to clarify differences in foot pressure patterns between control subjects and ACL-deficient patients; a variety of parameters based on the COP trace using a foot pressure measurement could help predict the gait characteristics of patients and facilitate better gait analysis.
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