Onset of quadriceps activation and torque variation during stair ascent in individuals with patellofemoral pain

Heloyse Uliam Kuriki, Fábio Mícolis de Azevedo, Rúben de Faria Negrão Filho, Neri Alves

Resumo


Introduction: Studies have used surface electromyography (EMG) to understand motor recruitment in individuals with patellofemoral pain syndrome (PFPS); however, there is no consensus in the literature. Objective: To understand if, in addition to neuromuscular disorders, there are changes in rotational patterns in individuals with PFPS. Methods: Twenty-two control pain-free subjects and eleven subjects with PFPS were assessed during stair ascent with respect to the onset of muscle activation and percentage of torque variation (PTV). Result: The PFPS group showed previous activation of vastus lateralis (VL) (21.1 ± 58.1ms), while simultaneous activation was observed in the control group (2.8 ± 30.7ms, p=0.01). The groups also showed differences in relation to the PTV (p=0.02): the control group showed greater variation in torque (26.7 ± 35.3%) compared to the PFPS group (17.5 ± 35.9%). Conclusion: People with PFPS have prior activation of VL and lower tendency towards body rotation, which may suggest patellar lateralization.

Palavras-chave


Electromyography; Patellofemoral pain syndrome; Torque.

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DOI: https://doi.org/10.5585/conssaude.v11n4.3810

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