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Biomédica
versão impressa ISSN 0120-4157
Resumo
VILLAQUIRAN, Andrés Felipe; RIVERA, Diana María; PORTILLA, Enmanuel Fernando e JACOME, Sandra Jimena. Vastus lateralis and medialis muscular activation during frontal and sagittal single-leg jumps in sportswomen. Biomédica [online]. 2020, vol.40, n.1, pp.43-54. ISSN 0120-4157. https://doi.org/10.7705/biomedica.4938.
Introduction:
Differences in the lateral and medial portions from quadriceps muscular activation during the execution of the jump can become a neuromuscular risk factor raising knee dynamic valgus and increasing the risk for anterior cruciate ligament injury.
Objective:
To determine the difference in the activation of the lateral and medial vastus using surface electromyography during single-leg jumps in the sagittal and frontal plane in female athletes.
Materials and methods:
This was a quantitative, cross-sectional study. A total of 64 female athletes participated. We carried out anthropometric measurements, vertical and lateral single-leg jump tests with the evaluation of vastus medialis and lateral electromyographic activation during the tests and iliotibial band flexibility assessment.
Results:
There was a statistically significant relationship (p≤0.05) between the body mass index, fat percentage, and vertical single-leg jump power. We also found statistical significance (p≤0.05), with greater activation of the lateral vastus in the right lower limb vertical jump and in the lateral jump in both lower limbs.
Conclusion:
The athletes presented differences in quadriceps activation, showing higher lateral vastus activation in most of the single-leg jumps, both in the sagittal and frontal plane. This may increase the risk for suffering knee injuries during sports practice.
Palavras-chave : Electromyography; sports; women; knee; muscles; anterior cruciate ligament; potency; primary prevention.