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  • Title: Patellar tendinopathy alters the distribution of lower extremity net joint moments during hopping.
    Author: Souza RB, Arya S, Pollard CD, Salem G, Kulig K.
    Journal: J Appl Biomech; 2010 Aug; 26(3):249-55. PubMed ID: 20841615.
    Abstract:
    The purpose of the current investigation was to test the hypothesis that subjects with patellar tendinopathy would demonstrate altered sagittal plane joint moment contributions during hopping tasks. Fourteen subjects (7 patellar tendinopathy, 7 controls) participated. Sagittal net joint moments of the lower extremity, total support moment, and joint contributions to the total support moment were calculated while subjects hopped continuously at a self-selected frequency and at 1.67 Hz. Significant differences were observed for contributions to the total support moment (p=.022). When averaged across hopping frequencies, subjects with patellar tendinopathy demonstrated greater hip contribution (p=.030) and lesser knee contribution (p=.006) compared with the control subjects. Shifting the workload away from the knee and toward the hip may result in a detrimental increase in hip demand and potentially harmful long-term effects on the articular cartilage of the hip.
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