Transformations in muscular mechanical properties and the impact of dynamic balance on free kick accuracy in elite football players
DOI:
https://doi.org/10.47197/retos.v64.110222Keywords:
Dynamic Balance, Muscle Properties, Free Kick Accuracy, Football, BiomechanicsAbstract
Introduction: This study examines the influence of dynamic balance and muscle mechanical properties on the accuracy of free kicks in elite football players. Skeletal muscles, critical for movement, possess mechanical properties such as stiffness, strength, and elasticity, which are pivotal for maintaining balance and executing accurate kicks.
Objective: The objective of this research was to explore how these biomechanical factors impact free kick performance, with a focus on identifying significant relationships.
Methodology: The study employed a descriptive methodology, analyzing data from six elite players in the Iraqi Stars League using tools like the Myoton device and Y-Balance test. Players underwent specialized training, and assessments were conducted pre- and post-training.
Results: Results indicated a strong correlation between enhanced muscle stiffness, dynamic balance, and free kick accuracy. Key findings demonstrated that quadriceps and gastrocnemius muscle properties significantly influenced performance.
Discussion: The discussion highlighted how these findings align with existing literature, emphasizing the biomechanical underpinnings of dynamic balance and muscle efficiency.
Conclusions: It is suggested that targeted training focusing on muscle mechanical properties and balance enhancement can effectively improve football performance, particularly in free kicks.
References
Bonato, P., Roy, S. H., Knaflitz, M., & De Luca, C. J. (2001). Time frequency parameters of the surface myoelectric signal for assessing muscle fatigue during cyclic dynamic contractions. IEEE Transactions on Biomedical Engineering, 48(7), 745-753. https://doi.org/10.1109/10.930899
Clancy, E. A., Farina, D., & Merletti, R. (2005). Cross-comparison of time- and frequency-domain methods for monitoring the myoelectric signal during a cyclic, force-varying, fatiguing hand-grip task. Journal of Electromyography and Kinesiology, 15(3), 256-265. https://doi.org/10.1016/J.JELEKIN.2004.11.002
Dankel, S. J., & Razzano, B. M. (2020). The impact of acute and chronic resistance exercise on muscle stiffness: A systematic review and meta-analysis. Journal of Ultrasound, 23, 473-480. https://doi.org/10.1007/s40477-020-00432-2
Ettema, G. J. C., & Huijing, P. A. (1994). Skeletal muscle stiffness in static and dynamic contractions. Journal of Biomechanics, 27(11), 1361-1368. https://doi.org/10.1016/0021-9290(94)90045-0
Fernández-Cortés Tolosa, J. A., Cáceres Sánchez, L., Antunez Medina, A., García Rubio, J., & Ibáñez Godoy, S. J. (2022). Analysis of the influece of situational variables in professional soccer. Retos, 46, 114–119. https://doi.org/10.47197/retos.v46.91541
Forrester, B. J., & Petrofsky, J. S. (2004). Effect of electrode size, shape, and placement during electrical stimulation. Journal of Applied Research, 4(2), 346-354.
Gabriel, D. A., Christie, A., Inglis, J. G., & Kamen, G. (2011). Experimental and modelling investigation of surface EMG spike analysis. Medical Engineering and Physics, 33(4), 427-437. https://doi.org/10.1016/j.medengphy.2010.11.010
Hjermstad, M. J., Fayers, P. M., Haugen, D. F., Caraceni, A., Hanks, G. W., Loge, J. H., ... & Kaasa, S. (2011). Studies comparing numerical rating scales, verbal rating scales, and visual analogue scales for assessment of pain intensity in adults: A systematic literature review. Journal of Pain and Symptom Management, 41(6), 1073-1093. https://doi.org/10.1016/J.JPAINSYMMAN.2010.08.016
Holcomb, W. R., Rubley, M. D., Lee, H. J., & Guadagnoli, M. A. (2007). Effect of hamstring-emphasized resistance training on hamstring:quadriceps strength ratios. Journal of Strength and Conditioning Research, 21(1), 41-47. https://doi.org/10.1519/R-18795.1
Li, X., Samuel, O. W., Zhang, X., Wang, H., Fang, P., & Li, G. (2017). A motion-classification strategy based on sEMG-EEG signal combination for upper-limb amputees. Journal of NeuroEngineering and Rehabilitation, 14(1), 1-14. https://doi.org/10.1186/s12984-016-0212-z
Melo, A. S. C., Cruz, E. B., Vilas-Boas, J. P., & Sousa, A. S. P. (2022). Scapular dynamic muscular stiffness assessed through myotonometry: A narrative review. Sensors, 22(1), 1-19. https://doi.org/10.3390/s22114024
Morales-Sánchez, V., Falcó, C., Hernández-Mendo, A., & Reigal, R. E. (2022). Efficacy of electromyographic biofeedback in muscle recovery after meniscectomy in soccer players. Sensors, 22(11), 4024. https://doi.org/10.3390/s22114024
Miqueleiz, U., Cabello-Olmo, M., & Aguado-Jimenez, R. (2024). Stride frequency patterns during both treadmill and outdoor running in endurance runners. Retos, 57, 131–136. https://doi.org/10.47197/retos.v57.104569
MyotonPRO Digital Palpation Device User Manual (2010). Device model: 1B, device firmware v.1.7.2. Myoton Desktop Software. Retrieved from https://www.myoton.com
Navarro, E., Chorro, D., Torres, G., Navandar, A., Rueda, J., & Veiga, S. (2021). Electromyographic activity of quadriceps and hamstrings of a professional football team during Bulgarian squat and lunge exercises. Journal of Human Sport and Exercise, 16(3), 581-594. https://doi.org/10.14198/jhse.2021.163.08
Plisky, P., Schwartkopf-Phifer, K., Huebner, B., Garner, M. B., & Bullock, G. (2021). Systematic review and meta-analysis of the Y-Balance test lower quarter: Reliability, discriminant validity, and predictive validity. International Journal of Sports Physical Therapy, 16, 1190-1209.
Rigoni, I., Bonci, T., Bifulco, P., & Fratini, A. (2022). Characterisation of the transient mechanical response and the electromyographical activation of lower leg muscles in whole body vibration training. Scientific Reports, 12(1), 1-12. https://doi.org/10.1038/s41598-022-10137-8
Safaa Abdulwahab Ismaeel, A., Falih Hashim Fenjan, A., & Rafid Habib Qadori, L. (2020). Biomechanical analysis of some variables and EMG of the muscles during the performance of the snatch lift in weightlifting. International Journal of Psychosocial Rehabilitation, 24(1), 2020-2020.
Scurr, J. C., Abbott, V., & Ball, N. (2011). Quadriceps EMG muscle activation during accurate soccer instep kicking. Journal of Sports Sciences, 29(3), 247-251. https://doi.org/10.1080/02640414.2010.523085
Taresh, S. A. (2020). The effect of physical exercises using the (DYNA FOOT) device in developing some biochemical variables and the skill of jumping in front-high shooting in handball for juniors. European Journal of Molecular and Clinical Medicine, 7(6), 2704-2712.
Uwamahoro, R., Sundaraj, K., & Subramaniam, I. D. (2021). Assessment of muscle activity using electrical stimulation and mechanomyography: A systematic review. BioMedical Engineering Online, 20, 1-22. https://doi.org/10.1186/s12984-021-00860-3
Way, K. L., Lee, A. S., Twigg, S. M., & Johnson, N. A. (2021). The effect of acute aerobic exercise on central arterial stiffness, wave reflections, and hemodynamics in adults with diabetes: A randomized cross-over design. Journal of Sport and Health Science, 10(4), 499-506. https://doi.org/10.1016/J.JSHS.2020.02.009
Welis, W., Effendi, R., Mario, D. T., Ilham, I., & Ihsan, N. (2024). The Consuming soy flour after weight training: An alternative to increase leg muscle strength. Retos, 57, 197–204. https://doi.org/10.47197/retos.v57.103147
Wu, C., Yan, Y., Cao, Q., Fei, F., Yang, D., Lu, X., ... & Song, A. (2020). SEMG measurement position and feature optimization strategy for gesture recognition based on ANOVA and neural networks. IEEE Access, 8, 51473-51484. https://doi.org/10.1109/ACCESS.2020.2982405
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2025 safaa Ismaeel, Marwa Jihad, saddah Ibraheem, Mohammed Aljahni, Rafid Qaduri, fakhir Aldean Qasim

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and ensure the magazine the right to be the first publication of the work as licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgment of authorship of the work and the initial publication in this magazine.
- Authors can establish separate additional agreements for non-exclusive distribution of the version of the work published in the journal (eg, to an institutional repository or publish it in a book), with an acknowledgment of its initial publication in this journal.
- Is allowed and authors are encouraged to disseminate their work electronically (eg, in institutional repositories or on their own website) prior to and during the submission process, as it can lead to productive exchanges, as well as to a subpoena more Early and more of published work (See The Effect of Open Access) (in English).
This journal provides immediate open access to its content (BOAI, http://legacy.earlham.edu/~peters/fos/boaifaq.htm#openaccess) on the principle that making research freely available to the public supports a greater global exchange of knowledge. The authors may download the papers from the journal website, or will be provided with the PDF version of the article via e-mail.