The effect of hip abduction on muscle activity in healthy subjects
Author Information
Author(s): Bevilaqua-Grossi Débora, Monteiro-Pedro Vanessa, de Vasconcelos Rodrigo Antunes, Arakaki Juliano Coelho, Bérzin Fausto
Primary Institution: Department of Biomechanics, Medicine and Rehabilitation of Locomotor Apparatus, Ribeirão Preto School of Medicine, University of São Paulo (FMRP-USP)
Hypothesis
Can hip abduction influence the EMG activity of vastus medialis obliquus, vastus lateralis longus, and vastus lateralis obliquus in healthy subjects?
Conclusion
Hip abduction does not facilitate VLL and VLO activity in relation to the VMO in healthy subjects.
Supporting Evidence
- The VLO muscle showed higher EMG activity during knee extension compared to hip abduction.
- No significant differences were found in VLL EMG activity among the exercises.
- Results indicate that hip abduction does not selectively activate the VMO compared to the VLL and VLO.
Takeaway
This study looked at how hip abduction affects certain thigh muscles in healthy people, and found that it doesn't help one muscle work better than another.
Methodology
Twenty-one healthy subjects performed maximum voluntary isometric contractions for knee extension and hip abduction while EMG signals were recorded.
Limitations
The study only included healthy subjects and did not measure gluteus medius EMG activity.
Participant Demographics
21 healthy volunteers (11 males and 10 females), aged 19 to 28.
Statistical Information
P-Value
p < 0.0007 for males; p < 0.02196 for females
Statistical Significance
p ≤ 0.05
Digital Object Identifier (DOI)
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