scholarly journals Effects of EMG-Biofeedback Using Closed Kinetic Chain Exercise on Q-angle and Quadriceps Muscle Activation in Patellofemoral Pain Syndrome

2016 ◽  
Vol 28 (2) ◽  
pp. 65-70 ◽  
Author(s):  
Je-Ho Kim
Keyword(s):  
Muscle Activation ◽  
Pain Syndrome ◽  
Patellofemoral Pain Syndrome ◽  
Quadriceps Muscle ◽  
Patellofemoral Pain ◽  
Emg Biofeedback ◽  
Kinetic Chain ◽  
Q Angle ◽  
Closed Kinetic Chain

scholarly journals Patellofemoral pain syndrome alters joint position sense: a case-control study

2014 ◽  
Vol 13 (3) ◽  
pp. 331-339
Author(s):  
Fabio Navarro Cyrillo ◽  
Cristina Maria Nunes Cabral
Keyword(s):  
Pain Syndrome ◽  
Absolute Error ◽  
Patellofemoral Pain Syndrome ◽  
Position Sense ◽  
Patellofemoral Pain ◽  
Joint Position Sense ◽  
Joint Position ◽  
Kinetic Chain ◽  
Open Kinetic Chain ◽  
Closed Kinetic Chain

Introduction: The evaluation of changes in joint position sense (JPS) of the knee may be crucial for the identification of disorders that could start during the development of patellofemoral pain syndrome (PFPS). Objective: To evaluate JPS of the knee in PFPS. Methods: Twenty nine women (15 healthy and 14 with PFPS) reproduced knee flexion angles of 45° and 60° during open kinetic chain exercises and of 45° during closed kinetic chain exercises. Results: The absolute error in the active reproduction of 45° in open kinetic chain exercises was significantly higher in the experimental group. There were significant differences in absolute and relative errors between the groups for active reproduction at 45° in open and closed kinetic chain exercises. Conclusions: This study suggests that PFPS alters JPS during active reproduction of the 45° angle in both open and closed kinetic chain exercises.

Vastus Medialis Obliquus and Vastus Lateralis Activity in Patients with and without Patellofemoral Pain Syndrome

1997 ◽  
Vol 6 (1) ◽  
pp. 1-10 ◽  
Author(s):  
John P. Miller ◽  
Daniel Sedory ◽  
Ronald V. Croce
Keyword(s):  
Knee Flexion ◽  
Vastus Lateralis ◽  
Pain Syndrome ◽  
Patellofemoral Pain Syndrome ◽  
Patellofemoral Pain ◽  
Vastus Medialis ◽  
Kinetic Chain ◽  
Vastus Medialis Obliquus ◽  
Closed Kinetic Chain ◽  
Step Down

The purpose of this study was to examine the efficacy of closed kinetic chain exercises in preferentially recruiting the oblique fibers of the vastus medialis obliquus (VMO). Fifteen athletically active females, 6 with patellofemoral pain syndrome (PFPS) and 9 without PFPS, performed two isometric and two dynamic closed kinetic chain exercises. The isometric exercises were a static lunge with 30° of knee flexion (SL@30°) and with 70° of knee flexion (SL@70°). The dynamic exercises were a step-up/step-down exercise (SUSD) and a modified wall slide (MWS). Selective recruitment of the VMO occurred during the MWS (p <.05) and the SUSD in the subjects without PFPS (p <.05). For the SL@70° (p <.01), the MWS (p <.01), and the SUSD (p <.05), subjects with PFPS had greater activity of the vastus lateralis (VL), resulting in a lower VMO: VL ratio for those exercises (p < .05). It was concluded that the closed kinetic chain exercises examined in this study do not preferentially recruit the VMO in individuals with PFPS. In addition, individuals with PFPS have a lower VMO:VL ratio during these exercises compared to individuals without PFPS.

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