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Asian Journal of Sports Medicine

Sports Medicine Research Center, TUMS

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https://doi.org/10.5812/asjsm.34234

Surface Electromyography Assessments of the Vastus medialis and Rectus femoris Muscles and Creatine Kinase after Eccentric Contraction Following Glutamine Supplementation

Author(s):
Farhad Rahmani-NiaFarhad Rahmani-Nia1, Esmail FarzanehEsmail Farzaneh2,*, Arsalan DamirchiArsalan Damirchi1, Ali Shamsi MajlanAli Shamsi Majlan1, Vahid TadibiVahid Tadibi3
1Faculty of Physical Education and Sport Sciences, University of Guilan, Rasht, Iran
2Department of Physical Education and Sport Sciences, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran
3Faculty of Physical Education, Razi University, Kermanshah, Iran
Asian Journal of Sports Medicine:Vol. 5, issue 1; 54-62
Published online:Dec 28, 2013
Article type:Research Article
Received:May 03, 2013
Accepted:Dec 02, 2013
How to Cite:Rahmani-Nia F, Farzaneh E, Damirchi A, Majlan AS, Tadibi V. Surface Electromyography Assessments of the Vastus medialis and Rectus femoris Muscles and Creatine Kinase after Eccentric Contraction Following Glutamine Supplementation. Asian J Sports Med. 2013;5(1):34234. doi: https://doi.org/10.5812/asjsm.34234

Abstract

Purpose:

L-glutamine is the most abundant amino acid found in human muscle and plays an important role in protein synthesis and can reduce the levels of inflammation biomarkers and creatine kinase (CK) after training sessions. Delayed onset muscle soreness (DOMS) develops after intense exercise and is associated with an inflammatory response. The purpose of this study was to investigate the effect of glutamine supplementation on surface electromyography activity of the vastus medialis muscle (VMM) and rectus femoris muscle (RFM) and levels of creatine kinase after an eccentric contraction.

Methods:

Seventeen healthy men (age: 22.352.27yr; body mass: 69.91 9.78kg; height: 177.084.32cm) were randomly assigned to experimental (n=9) and control groups (n=8) in a double-blind manner. In both groups, subjects were given L-glutamine supplementation (0.1g.kg-1) or placebo three times a week for 4 weeks. Median frequency (MDF) and mean power frequency (MPF) for VMM and RFM muscles and also CK measurements were performed before, 24h and 48 h after a resistance training session. The resistance training included 6 sets of eccentric leg extensions to exhaustion with 75% of 1RM.

Results:

There was no significant difference between groups for MDF or MPF in VMM and RFM. The difference of CK level between the groups was also not significant.

Conclusion:

The results of this study indicate that glutamine supplementation has no positive effect on muscle injury markers after a resistance training session.

Keywords
Mean Power Frequency
Median Frequency
Creatine Kinase
Eccentric Exercise

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