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Yu-Jen Chen and Christopher M. Powers

The purpose of this study was to determine if persons with patellofemoral pain (PFP) exhibit differences in patellofemoral joint reaction forces (PFJRFs) during functional activities. Forty females (20 PFP, 20 controls) underwent two phases of data collection: (1) magnetic resonance imaging (MRI) and (2) biomechanical analysis during walking, running, stair ascent, and stair descent. A previously described three-dimensional model was used to estimate PFJRFs. Resultant PFJRFs and the orthogonal components were reported. The PFP group demonstrated lower peak resultant PFJRFs and posterior component and superior component of the PFJRFs compared with the control group across all conditions. However, the PFP group had a higher peak lateral component of the PFJRF in three out of the four conditions evaluated. The lower resultant PFJRFs suggested that individuals with PFP may employ strategies to minimize patellofemoral joint loading, but it did not result in diminished lateral forces acting on the patella.

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Hyunjae Jeon and Abbey C. Thomas

plantar flexion angles at initial contact were also noted. Significant pain reduction 1 – 4 and improvement of self-reported function 1 – 3 were observed throughout the included studies. Introduction/Clinical Scenario Healthcare providers frequently encounter patients with patellofemoral pain (PFP), a

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John C. Spiker and Denise L. Massie

Effective management of patellofemoral pain is challenging to the practitioner when attempting to maintain the athlete's desired activity level while minimizing the symptoms. Due to the numerous etiological factors behind anterior knee pain, comprehensive management must include a lower extremity evaluation of muscular flexibility and strength as well as biomechanical abnormalities. Rehabilitation programs must focus on the flexibility, strength, endurance and proprioception of the extremity while reducing abnormal biomechanical forces. Programs to treat these abnormalities that increase patellofemoral stress must be systematically upgraded one variable at a time while monitoring the symptoms on a daily basis.

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Neal R. Glaviano and Susan Saliba

Patellofemoral pain (PFP) is a chronic condition that results in pain to the anterior knee, specifically retropatella or peripatella due to loading on the joint during weight-bearing activities. Those with PFP often have pain during daily tasks such as walking, stair ambulation, squatting, and

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Tzu-Chieh Liao, Joyce H. Keyak and Christopher M. Powers

Running is one of the most popular recreational activities in the United States. However, the overall incidence of lower-extremity running injuries has been reported to range from 59% to 79%. 1 , 2 Among all running-related injuries, patellofemoral pain (PFP) is most commonly reported, accounting

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Shiho Goto, Naoko Aminaka and Phillip A. Gribble

Patellofemoral pain (PFP) is a common overuse knee injury accounting for approximately 10% to 25% of knee injuries diagnosed in physically active young adult populations. 1 , 2 Problems associated with PFP include long-lasting pain, a high recurrence rate following an initial exercise

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Pablo Fanlo-Mazas, Elena Bueno-Gracia, Alazne Ruiz de Escudero-Zapico, José Miguel Tricás-Moreno and María Orosia Lucha-López

Patellofemoral pain syndrome (PFPS) is one of the most common musculoskeletal presentations in general practice 1 and sports medicine clinics. 2 The source of patellofemoral pain (PFP) is believed to be multifactorial and could be related to proximal, local, and distal factors. 3 Tightness or

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Marcie Fyock, Nelson Cortes, Alex Hulse and Joel Martin

Clinical Scenario An estimated 20 million Americans run recreationally each year, of which 65% will incur a running-related injury yearly. 1 A common complaint among this group is patellofemoral pain (PFP)—females being 2.33 times more likely to develop PFP compared with males. 2 PFP is often

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Mastour S. Alshaharani, Everett B. Lohman, Khaled Bahjri, Travis Harp, Mansoor Alameri, Hatem Jaber and Noha S. Daher

Patellofemoral pain syndrome (PFPS) is characterized by pain at the patella that tends to worsen with certain movements such as squatting, running, and ascending or descending stairs. 1 The most recent statistics for PFPS in the United States show a steady increase in cases, with 1.5% to 7.3% of

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Lori Bolgla and Terry Malone

Objective:

To provide evidence regarding the therapeutic effects of exercise on subjects with patellofemoral-pain syndrome (PFPS).

Data Sources:

Evidence was compiled with data located using the Medline, CINAHL, and SPORTDiscus databases from 1985 to 2004 using the key words patellofemoral pain syndrome, exercise, rehabilitation, and strength.

Study Selection:

The literature review examined intervention studies evaluating the effectiveness of exercise in subjects specif-cally diagnosed with PFPS. Articles were selected based on clinical relevance to PFPS rehabilitation that required an intervention of a minimum of 4 weeks.

Data Synthesis:

The review supports using exercise as the primary treatment for PFPS.

Conclusions:

Evidence exists regarding the use of isometric, isotonic, isokinetic, and closed kinetic chain exercise. Although clinicians have advocated the use of biofeedback and patella taping, there is limited evidence regarding the efficacy of these interventions on subjects diagnosed with PFPS.