Studies in Sport Medicine

Assessing Electromyographic Activity Ratio of the Vastus Medialis Oblique to Vastus Laterlis Muscle after Resistance Eccentric and Cconcentric Training

Document Type : Research Paper

Authors

Talieh Bagheri 1
Bahram Abedi 1
Nosratollah Hedayatpour 2

1 Department of Exercise Physiology, Mahallat Branch, Islamic Azad University, Mahallat, I.R. Iran

2 Department of Sport Sciences, University of Bojnord, Bojnord, Iran.

https://doi.org/10.22089/smj.2022.11597.1542
Abstract
The  aim of this study was to assess the effect of  resistance eccentric and concentric training on electromyographic (EMG) activity ratio  of the  vastus medilais oblique (VMO) to the vastus lateralis muscle (VL). 26 healthy men participated in this study. Training  protocole contained 36 sessions of resistance eccenentric and concentric training at the level of  80 % of one repetation maximum (1RM) on leg press machine. Maximal voluntary contraction (MVC) and EMG activity of the VMO and VL muscle recorded before and after resistance eccentric and concentric training. Maxmimal voluntary contraction of quadriceps and EMG activitiy of the VMO and VL muscle significantly increased after training (P <0.05) and  depended on the training type (P <0.05). Eccentric training resulted in a greater increase in maximal voluntary contraction and EMG activity of  the VMO muscle as compared to concentric training (P <0.05).  The increased EMG activity of the VMO to VL muscle play an important role in patella stabilization, and has commonly been  used  as an effective way to prevent from  lateral patella tilt. Thus, it  is recommended that eccentric training be included in rehabilation program for lateral patella tilt.
 

Keywords

: Eccentric
Concentric
Qudericeps muscle
Electromyography

Subjects

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  • Receive Date 16 November 2021
  • Revise Date 22 May 2022
  • Accept Date 13 April 2022

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