The Relationship Between Quadriceps Muscle Activation and Q Angle on Dynamic Balance in Women

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YILMAZ MENEK M., Budak M., Badilli F. S.

Celal Bayar Üniversitesi Sağlık Bilimleri Enstitüsü Dergisi, vol.10, no.3, pp.204-210, 2023 (Peer-Reviewed Journal) identifier


Introduction: Lower extremity biomechanics affects the relationship between Q angle, quadriceps muscle activation and the balance. Objectiveː The aim was to examine the relationship between Q angle and quadriceps muscle activation on dynamic balance position in women. Materials and Methodsː Forty women were included in the study. The muscle activation of the quadriceps during dynamic balance in a single leg stance was recorded. A tape measure was used to measure Q angle, surface electromyography was used to assess muscle activation, the Flamingo Balance Test was used to assess static balance, the TechnoBody PK 200WL computerized balance device was used to assess dynamic balance, and the Short Form Musculoskeletal Assessment was used to assess functionality. Resultsː There was a statistically significant positive correlation between the Q angle standing and supine position and vastus medialis muscle activation respectively, (r=0.35, p=0,02; r=0.40, p=0.01). There was a statistically significant positive correlation between the perimeter length and Q angle in standing/supine position respectively, (r=0.33, p=0.04; r=0.32, p=0.04). Area gap percentage and Q angle standing (r=0.89, p=0.02), supine position Q angle values (r=0.63, p=0.03) were positively correlated. Conclusionː If vastus medialis is more strengthened, Q angle would be more normalized, so quadriceps muscle strengthening exercises are helpful for the normalization of the Q angle. Also, when the Q angle is normalized, a single leg balance would be revealed.