How Can We Strengthen the Quadriceps Femoris in Patients with Patellofemoral Pain Syndrome?

Kaya, Defne; Doral, Mahmut Nedim; Callaghan, Michael J.

doi:10.1007/978-3-642-15630-4_153

Cited by 14 publications

(16 citation statements)

References 49 publications

(59 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1,9,12,18,27 Both forms of exercise have their advantages with respect to quadriceps strengthening. Weight bearing exercises are more functional in nature 7,11 and incorporate contractions of multiple agonist and antagonist muscle groups.…”

mentioning

confidence: 99%

Patellofemoral Joint Stress During Weight-Bearing and Non—Weight-Bearing Quadriceps Exercises

Powers¹,

Ho²,

Chen³

et al. 2014

Journal of Orthopaedic & Sports Physical Therapy

View full text Add to dashboard Cite

Quadriceps strengthening is a common com ponent of the rehabilitation program for persons with patellofemoral pain (PFP) and typically includes weightbearing and non-weight bearing exercises. 1,9,12,18,27 Both forms of exercise have their advantages with respect to quadriceps strengthening. Weight bearing exercises are more functional in nature 7,11 and incorporate contractions of multiple agonist and antagonist muscle groups. 1921,25In contrast, nonweight-bearing knee extension exercises require less cocontraction of antagonist muscles thus provide better quadriceps muscle isolation. 5When designing a quadricepsstrengthening program for individuals with PFP, it is important to select exercises that promote muscle loading and adaptation and minimize patellofemoral joint (PFJ) stress and pain. Steinkamp and colleagues 17 first described the influence of weight-bearing status on PFJ stress. These authors reported a contrast in the pattern of PFJ stress during weight-bearing and non-weight-bearing exercises performed at 0° to 90° of knee flexion. During the weight-bearing task (leg press), PFJ stress increased linearly from 0° to 90° of knee flexion.17 During the non-weight-bearing knee extension exercise, however, PFJ stress was greatest at 0° and decreased with knee flexion. 17The findings of Steinkamp et al 17 have been challenged by Escamilla and colleagues, 6 who quantified PFJ reaction forces during similar weight-bearing and non-weight-bearing tasks (squat and knee extension, respectively). These authors reported that the PFJ reaction T T STUDY DESIGN: Single-group, repeatedmeasures design. T T OBJECTIVE:To compare patellofemoral joint (PFJ) stress among weight-bearing and nonweight-bearing quadriceps exercises. T T BACKGROUND: An important considerationwhen prescribing exercises to strengthen the quadriceps in persons with patellofemoral pain is to minimize PFJ loading. Currently, there is disagreement in the literature as to which exercises and ranges of motion best accomplish this goal. T T METHODS:Ten healthy subjects participated.Lower extremity kinematics, kinetics, and electromyography of the knee musculature were obtained during a weight-bearing squatting exercise and 2 non-weight-bearing knee extension exercises: (1) knee extension with variable resistance, and (2) knee extension with constant resistance. A previously described biomechanical model was used to estimate PFJ stress at 0°, 15°, 30°, 45°, 60°, 75°, and 90° of knee flexion. PFJ stress was compared among the 3 exercises using a 2-way analysis of variance with repeated measures. T T RESULTS:Compared to the 2 non-weightbearing exercises, the squat exercise produced significantly higher PFJ stress at 90°, 75°, and 60° of knee flexion. Conversely, the 2 non-weight-bearing exercises produced significantly higher PFJ stress at 30°, 15°, and 0° of knee flexion when compared to the squat exercise. The knee-extension-withvariable-resistance exercise produced significantly lower PFJ stress than the knee-extension-withconstant-resistance exercise at ...

show abstract

mentioning

confidence: 99%

Patellofemoral Joint Stress During Weight-Bearing and Non—Weight-Bearing Quadriceps Exercises

Powers¹,

Ho²,

Chen³

et al. 2014

Journal of Orthopaedic & Sports Physical Therapy

View full text Add to dashboard Cite

show abstract

“…However, the behavior of the spin polarization P EC S (black circles) is shifted by about 45 deg with respect to the MOKE data. Hence, the maximum and minimum of P EC S were not along VEA1 rather than along an axis, named here surface easy axis (SEA), oriented 10 deg next to the <110> directions, which are the medium axes for Ni [3]. This shift we found for slow as well as fast (pulsing) current change (cf.…”

mentioning

confidence: 63%

“…The two opposite directions along an easy axis are usually equivalent, and the actual direction of magnetization can be either of them. The orientations of the easy and hard axes of the elemental 3d-Ferromagnets Fe, Co and Ni were experimentally well established [1][2][3]. The easy axes are <100> for Fe, <0001> for Co and <111> for Ni.…”

mentioning

confidence: 99%

Anomalous magnetic anisotropy of the topmost surface layer of Ni(110)

et al. 2011

View full text Add to dashboard Cite

The orientation of the magnetization of a Ni(110) surface was investigated using techniques with different probing depths. By making use of electron capture into excited states of fast He atoms, we found that the magnetization of the topmost surface layer is not aligned along the easy axes of Ni. However, for a 50 ML film Fe on Ni(110) we observed the magnetization of the topmost Fe surface layer is along the easy axes of Fe.Comment: 4 pages, 5 figures, PRB rapid (in press

show abstract

“…This study is the first to demonstrate the functional hyperextension lack and absence of the patellar dimple sign in female patients with patellofemoral pain syndrome. It is needed that future studies might investigate patellar dimple using leg extension test 18 , isokinetic test for muscle strength 19 , functional MRI (fMRI) for patellar position and patellar dimple sign during activities, movement analyses for the knee angles, and electromyographic (EMG) actions 18 for vastus medialis and vastus lateralis during activities. It is also suggested that future studies might look at the effect of functional hyperextension knee exercises/techniques and look at the longer term follow-up of these patients.…”

Section: Resultsmentioning

confidence: 99%

Functional hyper-extension deficit of the knee and patellar dimple sign in patellofemoral pain syndrome. A preliminary study

Kaya

Akşahin²,

DOai

2019

Muscle Ligaments and Tendons J

View full text Add to dashboard Cite

Introduction: The aim of this study was to investigate the presence of two new signs in patellofemoral pain syndrome (PFPS). Methods: Twenty-three patients with unilateral patellofemoral pain were participated. The study was designed with each subject acting as their own internal control by using the unaffected limb for comparison. The pain level during squat & stair up-down, functional hyper-knee-extension lack, absence of the patellar dimple sign, and Kujala patellofemoral score were measured in patients. Results: All patients had an unclear and weak patellar dimple sign. Mean pain level during the squat was 7.13±2.54. The functional hyper-knee-extension lack was 4.39±1.23° in the affected side while was-3.91±1.37° in the unaffected side. Conclusion: This study is the first to demonstrate absence of the patellar dimple sign and functional hyperextension lack in patients with patellofe moral pain syndrome. It is suggested that future studies might look at the effect of functional hyperextension knee exercises and look at the longer term fol

show abstract

How Can We Strengthen the Quadriceps Femoris in Patients with Patellofemoral Pain Syndrome?

Cited by 14 publications

References 49 publications

Patellofemoral Joint Stress During Weight-Bearing and Non—Weight-Bearing Quadriceps Exercises

Patellofemoral Joint Stress During Weight-Bearing and Non—Weight-Bearing Quadriceps Exercises

Anomalous magnetic anisotropy of the topmost surface layer of Ni(110)

Functional hyper-extension deficit of the knee and patellar dimple sign in patellofemoral pain syndrome. A preliminary study

Contact Info

Product

Resources

About