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Title: Non-linear flexion relationships of the knee with the hip and ankle, and their relative postures during landing
Authors: Yeow, C.H. 
Lee, P.V.S.
Goh, J.C.H. 
Keywords: Hip and ankle
Knee flexion
Peak ground reaction force
Relative postures
Issue Date: Oct-2011
Citation: Yeow, C.H., Lee, P.V.S., Goh, J.C.H. (2011-10). Non-linear flexion relationships of the knee with the hip and ankle, and their relative postures during landing. Knee 18 (5) : 323-328. ScholarBank@NUS Repository.
Abstract: The knee joint, together with the hip and ankle, contributes to overall shock absorption through their respective flexion motions during landing. This study sought to investigate the presence of a lower extremity coordination pattern by determining mathematical relationships that associate knee flexion angles with hip flexion and ankle dorsiflexion angles during landing phase, and to determine relative postures of the hip and ankle, with reference to the knee, and examine how these relative postures change during key events of the landing phase. Eight healthy male subjects were recruited to perform double-leg landing from 0.6-m height. Motion capture system and force-plates were used to obtain kinematics and ground reaction forces (GRF) respectively. Non-linear regression analysis was employed to determine appropriate mathematical relationships of the hip flexion and ankle dorsiflexion angles with knee flexion angles during the landing phase. Relative lower extremity postures were compared between events of initial contact, peak GRF and maximum knee flexion, using ANOVA on ranks. Our results demonstrated a lower extremity coordination pattern, whereby the knee flexion angles had strong exponential (R 2=0.92-0.99, p
Source Title: Knee
ISSN: 09680160
DOI: 10.1016/j.knee.2010.06.006
Appears in Collections:Staff Publications

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