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Muscle strength and flexibility characteristics of people displaying excessive medial knee displacement.
We defined a valgus collapse as a substantial medial knee displacement that could result from hip adduction, hip internal rotation, knee valgus and external tibial rotation.
Knee displacement is considered a risk factor in terms of future knee injuries [ 1- 3, 9, 10], but also other components such as displacement of the ankle, hip and trunk, may have an influence on the load of the knee.
This is in accordance with Mauntel et al., who found associations between medial knee displacement and decreased co-activation of gluteal to hip adductor muscles in non-injured individuals performing SLS [ 28].
In order to prevent PFP and ACL injuries, screening athletes in the early adolescence is a plausible method to detect and prevent frontal plane knee displacement, why it is necessary to develop simple, reliable and predictive screening tests [ 2].
These values were calculated for three different phases, based on the angular knee displacement: 300 milliseconds before initiating the movement (P1), from P1 to the knee flexion peak (P2), and from P2 up to the total knee extension (P3).
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Errors due to STA ranged from 1.6° to 22.4° for knee rotations and from 0.8 mm to 14.9 mm for knee displacements in healthy and OA subjects.
Root mean square errors with subject-specific knee joint models ranged from 2.2±1.2° to 6.0±3.9° for knee rotations and from 2.4±1.1 mm to 4.3±2.4 mm for knee displacements in healthy and OA subjects, respectively.
An initial knee abduction displacement was exhibited by more MR than SR participants.
Main Outcome Measures: Passive knee angular displacement data were collected during both manual knee muscle testing and pendulum tests by using an electrogoniometer.
We used this test to evaluate changes of the knee angular displacement, passive stiffness and viscosity in rheumatoid arthritis patients.
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