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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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Melissa Doozan, David M. Bazett-Jones, and Neal R. Glaviano

Key Points ▸ Two-dimensional assessment is reliable in females both with and without patellofemoral pain. ▸ Minimal training is required for novice assessors to reliably assess two-dimensional kinematics. ▸ Clinicians can evaluate squatting kinematics following interventions with two

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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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Emma F. Zuk, Gyujin Kim, Jacqueline Rodriguez, Brandon Hallaway, Amanda Kuczo, Shayna Deluca, Kirsten Allen, Neal R. Glaviano, and Lindsay J. DiStefano

Clinical Scenario Patellofemoral pain (PFP) is the common term for general knee pain relating to the front of the knee and around the patella. 1 PFP is one of the most commonly diagnosed knee conditions, with this phenomenon most often appearing in young, physically active individuals with females

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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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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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Julio Zago, Fellipe Amatuzzi, Tatiana Rondinel, and João Paulo Matheus

Patellofemoral pain syndrome (PFPS) is a pathology characterized by anterior knee pain and is responsible for driving athletes away from sports due to signs and symptoms of pain and instability in the patellofemoral joint. 1 , 2 The etiology of PFPS is varied and may be mainly related to joint

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Reza Heydari Armaki, Keramatollah Abbasnia, and Alireza Motealleh

Patellofemoral pain (PFP) is a condition characterized by an aching pain originating from the patellofemoral joint and peripatellar region. Patients with PFP typically complain of pain when the compressive load on the patellofemoral joint increases during activities, such as stair climbing