The effects of neck muscular fatigue on static and dynamic postural control in elite male volleyball players

AUTHORS

Maryam Mazidi 1 , * , Amir Letafatkar 2 , Maliheh Hadadnejad 2 , Siavash Rajabi 3

1 Dep a rtment of Sport Injuries and Corrective Exercise s , Hormo zgan University, Bandar Abbas, Iran.

2 Department of Biomechanics and Sport Injuries , Kharazmi University, Tehran, Iran.

3 Department of Sport Injuries and Corrective Exer cises , Boroujerd Brranch, Islamic Azad University, Boro u jerd, Iran

How to Cite: Mazidi M , Letafatkar A, Hadadnejad M , Rajabi S . The effects of neck muscular fatigue on static and dynamic postural control in elite male volleyball players, Hormozgan Med J. 2017 ; 20(6):e87367. doi: 10.18869/acadpub.hmj.20.6.407.

ARTICLE INFORMATION

Hormozgan Medical Journal: 20 (6); e87367
Published Online: February 15, 2017
Article Type: Research Article
Received: September 27, 2016
Accepted: February 15, 2017
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Abstract

Introduction: Muscular fatigue is a common phenomenon in daily sports activities and is worsening motor performance. The aim of this study was to determine the effect of neck muscular fatigue on static and dynamic postural control in elite male volleyball players.

Methods: For this study, 30 elite male athletes with mean age of 23.3±3.5 years old, height of 184.1±7.7 cm, and weight of 76.6±3.1 kg were selected in the available form and divided randomly into control and experimental groups. Fatigue protocol was induced on both sides via maximal exhausting protocol by instructing the subjects in experimental group to perform a “Dumbbell Shrug Trap Exercise” commonly used in fitness training to specifically involve Levator Scapulae and Trapezius superior muscles. The subjects’ dynamic and static postural control ımmediately after fatigue were assessed by Biodex System (level 4 and 3). For statistical analysis paired and sample t-test (α≤0.05) were used.

 

Results: The results of this study showed that in the level 4 of Biodex system there were significant differences in Ant-Post (P=0.030), Med-Lat (P=0.020), Limit of stability (P=0.012) and dynamic balance (P=0.011). In the level 8 of Biodex system there were significant differences in Ant-Post (P=0.022), Med-Lat (P=0.020), Limit of stability (P=0.011) and dynamic balance (P=0.021). With respect to study results, there were significant differences in static balance(P=0.012) in experimental group but there were not significant differences in control group (P=0.214).

Conclusion: Based on this study results, we concluded that neck muscle fatigue affects stability indexes, static and dynamic postural control so it seems that increasing the endurance of neck muscles to prevent early time fatigue, should be considered.

Keywords

Static Postural Control Dynamic Postural Control Elite Volleyball Players

© 2017, Hormozgan Medical Journal. This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/) which permits copy and redistribute the material just in noncommercial usages, provided the original work is properly cited.

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