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https://www.selleckchem.com/products/peg400.html Patellofemoral pain (PFP) is often categorized by researchers and clinicians using subjective self-reported PFP characteristics; however, this practice might mask important differences in movement biomechanics between PFP patients. To determine whether biomechanical differences exist during a high-demand multiplanar movement task for PFP patients with similar self-reported PFP characteristics but different quadriceps activation levels. Cross-sectional design. Biomechanics laboratory. A total of 15 quadriceps deficient and 15 quadriceps functional (QF) PFP patients with similar self-reported PFP characteristics. In total, 5 trials of a high-demand multiplanar land, cut, and jump movement task were performed. Biomechanics were compared at each percentile of the ground contact phase of the movement task (α = .05) between the quadriceps deficient and QF groups. Biomechanical variables included (1)whole-body center of mass, trunk, hip, knee, and ankle kinematics; (2)hip, knee, and ankle kinetics; andself-reported PFP characteristics. PFP patients with similar self-reported PFP characteristics exhibit different movement biomechanics, and these differences depend upon quadriceps activation levels. These differences are important because movement biomechanics affect injury risk and athletic performance. In addition, these biomechanical differences indicate that different therapeutic interventions may be needed for PFP patients with similar self-reported PFP characteristics. A limitation of previous studies on squatting mechanics is that the influence of trunk and shank inclination on the knee-extensor moment (KEM) has been studied in isolation. The purpose of the current study was to determine the influence of segment orientation on the KEM during freestanding barbell squatting. Repeated-measures cross sectional. University research laboratory. Sixteen healthy individuals (8 males and 8 females). Each participant performed 8

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