Quantitative MRI of Vastus Medialis, Vastus Lateralis and Gluteus Medius Muscle Workload after Squat Exercise: Comparison Between Squatting with Hip Adduction and Hip Abduction

• Authors: Augusto Baffa , Lilian Felicio , Marcelo Saad , Marcello Nogueira-Barbosa , Antonio Santos , Débora Bevilaqua-Grossi
• Languages of publication: EN

Abstracts

EN

The aim of the present study was to evaluate the use MRI to quantify the workload of gluteus medius (GM), vastus medialis (VM) and vastus lateralis (VL) muscles in different types of squat exercises. Fourteen female volunteers were evaluated, average age of 22 ± 2 years, sedentary, without clinical symptoms, and without history of previous lower limb injuries. Quantitative MRI was used to analyze VM, VL and GM muscles before and after squat exercise, squat associated with isometric hip adduction and squat associated with isometric hip abduction. Multi echo images were acquired to calculate the transversal relaxation times (T2) before and after exercise. Mixed Effects Model statistical analysis was used to compare images before and after the exercise (ΔT2) to normalize the variability between subjects. Imaging post processing was performed in Matlab software. GM muscle was the least active during the squat associated with isometric hip adduction and VM the least active during the squat associated with isometric hip abduction, while VL was the most active during squat associated with isometric hip adduction. Our data suggests that isometric hip adduction during the squat does not increase the workload of VM, but decreases the GM muscle workload. Squat associated with isometric hip abduction does not increase VL workload.

Keywords

EN

quantitative MRI; muscle functional magnetic resonance; proton relaxation time; T2; vastus medialis; gluteus medius; squat exercise

• Publisher: De Gruyter Open
• Journal: Journal of Human Kinetics
• Year: 2012
• Volume: 33
• Pages: 5-14

Dates

published

1 - 6 - 2012

online

4 - 7 - 2012

Contributors

author

Augusto Baffa

• Departamento de Ciências, Saúde Aplicadas ao Aparelho Locomotor

author

Lilian Felicio

• Departamento de Ciências, Saúde Aplicadas ao Aparelho Locomotor

author

Marcelo Saad

• Departamento de Ciências, Saúde Aplicadas ao Aparelho Locomotor

author

Marcello Nogueira-Barbosa

• Centro de Ciência de Imagens e Física Médica, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brasil

author

Antonio Santos

• Centro de Ciência de Imagens e Física Médica, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brasil

author

Débora Bevilaqua-Grossi

• Departamento de Ciências, Saúde Aplicadas ao Aparelho Locomotor

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Identifiers

DOI

10.2478/v10078-012-0039-z