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Analysis on the activation of the VMO and VLL muscles during semisquat exercises with and without hip adduction in individuals with patellofemoral pain syndrome.
J Electromyogr Kinesiol. 2005 Dec; 15(6):596-603.JE

Abstract

OBJECTIVE

The purpose of this study was to investigate the effect of hip adduction on the activity of the Vastus Medialis Obliquus (VMO) and Vastus Lateralis Longus (VLL) muscles during semisquat exercises.

METHODS

Twenty female subjects, divided into two groups comprising healthy and patellofemoral pain syndrome (PFPS) subjects (ten volunteers for each group), performed three double-leg semisquat exercise trials with maximum hip adduction isometric contraction (DLSS-HA) and three double-leg semisquat exercise trials without hip adduction (DLSS). The normalized electromyographic muscle data were analysed using Repeated Measure ANOVA (p<or=0.05).

RESULTS

The electrical activity of both VMO and VLL muscles was significantly greater during DLSS-HA exercise than during DLSS (p=0.0002) for both groups. Additionally, an independent Repeated Measure ANOVA revealed that the electric activity of the VLL muscle was significantly greater (p=0.0149) than that of the VMO muscle during DLSS exercises only for the PFPS group. However, no differences were found during DLSS-HA exercises.

CONCLUSIONS

Although there was no preferential VMO muscle activation, the association of hip adduction with squat exercise promoted a greater balance between the medial and lateral portions of the quadriceps femoris muscle and could be indicated for the conservatory treatment of PFPS patients. The association of isometric hip adduction with isometric semisquat exercises produced a more overall quadriceps activity and could be indicated for clinical rehabilitation or muscle strengthening programs.

Authors+Show Affiliations

Federal University of São Carlos, Rodovia Washington Luís, Km 235, São Carlos-SP 13565-905, Brazil.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Controlled Clinical Trial
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

15878289

Citation

Coqueiro, Kelly Rafael Ribeiro, et al. "Analysis On the Activation of the VMO and VLL Muscles During Semisquat Exercises With and Without Hip Adduction in Individuals With Patellofemoral Pain Syndrome." Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology, vol. 15, no. 6, 2005, pp. 596-603.
Coqueiro KR, Bevilaqua-Grossi D, Bérzin F, et al. Analysis on the activation of the VMO and VLL muscles during semisquat exercises with and without hip adduction in individuals with patellofemoral pain syndrome. J Electromyogr Kinesiol. 2005;15(6):596-603.
Coqueiro, K. R., Bevilaqua-Grossi, D., Bérzin, F., Soares, A. B., Candolo, C., & Monteiro-Pedro, V. (2005). Analysis on the activation of the VMO and VLL muscles during semisquat exercises with and without hip adduction in individuals with patellofemoral pain syndrome. Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology, 15(6), 596-603.
Coqueiro KR, et al. Analysis On the Activation of the VMO and VLL Muscles During Semisquat Exercises With and Without Hip Adduction in Individuals With Patellofemoral Pain Syndrome. J Electromyogr Kinesiol. 2005;15(6):596-603. PubMed PMID: 15878289.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Analysis on the activation of the VMO and VLL muscles during semisquat exercises with and without hip adduction in individuals with patellofemoral pain syndrome. AU - Coqueiro,Kelly Rafael Ribeiro, AU - Bevilaqua-Grossi,Débora, AU - Bérzin,Fausto, AU - Soares,Alcimar Barbosa, AU - Candolo,Cecília, AU - Monteiro-Pedro,Vanessa, PY - 2005/5/10/pubmed PY - 2006/1/24/medline PY - 2005/5/10/entrez SP - 596 EP - 603 JF - Journal of electromyography and kinesiology : official journal of the International Society of Electrophysiological Kinesiology JO - J Electromyogr Kinesiol VL - 15 IS - 6 N2 - OBJECTIVE: The purpose of this study was to investigate the effect of hip adduction on the activity of the Vastus Medialis Obliquus (VMO) and Vastus Lateralis Longus (VLL) muscles during semisquat exercises. METHODS: Twenty female subjects, divided into two groups comprising healthy and patellofemoral pain syndrome (PFPS) subjects (ten volunteers for each group), performed three double-leg semisquat exercise trials with maximum hip adduction isometric contraction (DLSS-HA) and three double-leg semisquat exercise trials without hip adduction (DLSS). The normalized electromyographic muscle data were analysed using Repeated Measure ANOVA (p<or=0.05). RESULTS: The electrical activity of both VMO and VLL muscles was significantly greater during DLSS-HA exercise than during DLSS (p=0.0002) for both groups. Additionally, an independent Repeated Measure ANOVA revealed that the electric activity of the VLL muscle was significantly greater (p=0.0149) than that of the VMO muscle during DLSS exercises only for the PFPS group. However, no differences were found during DLSS-HA exercises. CONCLUSIONS: Although there was no preferential VMO muscle activation, the association of hip adduction with squat exercise promoted a greater balance between the medial and lateral portions of the quadriceps femoris muscle and could be indicated for the conservatory treatment of PFPS patients. The association of isometric hip adduction with isometric semisquat exercises produced a more overall quadriceps activity and could be indicated for clinical rehabilitation or muscle strengthening programs. SN - 1050-6411 UR - https://www.unboundmedicine.com/medline/citation/15878289/Analysis_on_the_activation_of_the_VMO_and_VLL_muscles_during_semisquat_exercises_with_and_without_hip_adduction_in_individuals_with_patellofemoral_pain_syndrome_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S1050-6411(05)00037-4 DB - PRIME DP - Unbound Medicine ER -