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. 2016 Jun;20(2):1-7.
doi: 10.20463/jenb.2016.06.20.2.1. Epub 2016 Jun 30.

Interaction of ACTN3 gene polymorphism and muscle imbalance effects on kinematic efficiency in combat sports athletes

Hansang Jung  1 , Namju Lee  2 , Sok Park  3
Affiliations

Interaction of ACTN3 gene polymorphism and muscle imbalance effects on kinematic efficiency in combat sports athletes

Hansang Jung et al. J Exerc Nutrition Biochem. 2016 Jun.

Abstract

Purpose: The purpose of this study was to determine the interaction of ACTN3 gene polymorphism and muscle imbalance effects on kinematic efficiency changes in combat sports athletes.

Methods: Six types of combat sports athletes (Judo, Taekwondo, boxing, kendo, wrestling, and Korean Ssi-reum) participated in the study. ATCN3 gene polymorphism and muscle imbalance in lower extremity were evaluated followed by analysis of differences of moment in hip, knee, and ankle joint during V-cut jumping and stop. To examine the moment difference due to an interaction of ATCN3 polymorphism and muscle imbalance, all participants were divided into 4 groups (R+MB, R+MIB, X+MB, and X+MIB).

Results: There was no significant difference of hip, knee, and ankle joint moment in R allele and X allele during V-cut jumping and stop based on ACTN3 gene polymorphism. Otherwise, muscle imbalance of knee moment in X-axis and ground reaction force of knee in Z-axis showed a higher significance in muscle imbalance during V-cut jumping and stop compared to muscle balance (p<0.05). In addition, joint analysis showed that muscle imbalance in X allele group had significantly higher knee moment of V-cut ground reaction force in X-axis and higher ankle moment of jumping ground reaction force in X and Z-axis compared to muscle balance with R and/or X group (p <0.05).

Conclusion: This study confirmed that muscle imbalance in lower extremity of combat athletes might induce higher risk factors of sports injury incidence than genetic factor and training might reduce the ratio of sports injury risk incidence.

Keywords: ACTN3; Athletes; Muscle imbalance.

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Figures

Figure 1.
Figure 1.. Study design
Figure 2.
Figure 2.. V-cut and jumping and stopping
Figure 3.
Figure 3.. V-cut ground reaction force (GRF) based on ACTN3 gene polymorphism and muscle balance (R; R allele , X; X allele, MB; muscle balance, MIB; muscle imbalance)
Figure 4.
Figure 4.. Ankle X axis moment based on an interaction of ACTN3 gene polymorphism and muscle imbalance during jumping (R; R allele , X; X allele,, MB; muscle balance, MIB; muscle imbalance)
Figure 5.
Figure 5.. Ankle Z axis moment based on an interaction of ACTN3 gene polymorphism and muscle imbalance during jumping (R; R allele, X; X allele, MB; muscle balance, MIB; muscle imbalance)
Figure 6.
Figure 6.. GRF Z axis moment based on an interaction of ACTN3 gene polymorphism and muscle imbalance during jumping (R; R allele, X; X allele, MB; muscle balance, MIB; muscle imbalance, GRF: ground reaction force)
See this image and copyright information in PMC

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