Volume 6, Issue 4 (3-2021)
J Sport Biomech 2021, 6(4): 214-225 |
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1- Department of Physical Education and Sport Science, Faculty of Humanities, East Tehran Branch, Islamic Azad University, Tehran, Iran.
Abstract: (2538 Views)
Objective: Knee brace is one of the lower limb abnormalities. This study aimed to investigate the effect of knee kinematical parameters on the development of knee Genu Varum.
Methods: This study’s statistical sample was 32 taekwondo practitioners with red and black belts of sports clubs in the northeast of Tehran, determined using G-Power software and in two groups of 16 people in terms of gender, age, and membership in the field. The 8-week training intervention, which included 3session of 1-hour training sessions emphasizing performing the techniques of up-chulogi and yup-chaggy, was performed for the experimental group. The control group did not have any specific activity during this period. Knee kinematic indices include naval drop size tests, tibial torsion, Q angle, androgen enterogen, internal and external hip rotation, and knee hyperextension in the two groups of healthy and injured in pre and posttest was evaluated. The data were statistically analyzed using descriptive analysis using t-test and SPSS V. 23 software.
Results: According to the study results, a significant positive relationship was observed between the variables of the selected technique of up-chology and the technique of up-chugi on the incidence of knee Genu Varum. Also, there was a significant difference between the indices of naval drop (P=0.003), torsion (P=0.006), Q angle (P=0.005) and knee hyperextension (P=0.001) in pre-test to post-test results.
Conclusion: The selected exercises have increased the distance between the knees and functional disorders. Because the braced knee may play a role in influencing athletes’ negative performance and injury in training and competition, it is necessary to consider it in studies related to the prevention of potential injuries.
Methods: This study’s statistical sample was 32 taekwondo practitioners with red and black belts of sports clubs in the northeast of Tehran, determined using G-Power software and in two groups of 16 people in terms of gender, age, and membership in the field. The 8-week training intervention, which included 3session of 1-hour training sessions emphasizing performing the techniques of up-chulogi and yup-chaggy, was performed for the experimental group. The control group did not have any specific activity during this period. Knee kinematic indices include naval drop size tests, tibial torsion, Q angle, androgen enterogen, internal and external hip rotation, and knee hyperextension in the two groups of healthy and injured in pre and posttest was evaluated. The data were statistically analyzed using descriptive analysis using t-test and SPSS V. 23 software.
Results: According to the study results, a significant positive relationship was observed between the variables of the selected technique of up-chology and the technique of up-chugi on the incidence of knee Genu Varum. Also, there was a significant difference between the indices of naval drop (P=0.003), torsion (P=0.006), Q angle (P=0.005) and knee hyperextension (P=0.001) in pre-test to post-test results.
Conclusion: The selected exercises have increased the distance between the knees and functional disorders. Because the braced knee may play a role in influencing athletes’ negative performance and injury in training and competition, it is necessary to consider it in studies related to the prevention of potential injuries.
Type of Study: Research |
Subject:
Special
Received: 2020/08/6 | Accepted: 2020/12/10 | Published: 2021/03/1
Received: 2020/08/6 | Accepted: 2020/12/10 | Published: 2021/03/1
References
1. Silvernail, J.F., et al., The influence of body mass index and velocity on knee biomechanics during walking. Gait & posture, 2013. 37(4): p. 575-579. [DOI:10.1016/j.gaitpost.2012.09.016] [PMID]
2. Petroski, E.L., Revista Brasileira de Cineantropometria e Desempenho Humano. 2010
3. Górski, M. and J. Orysiak, Differences between anthropometric indicators and the impact force of taekwondo kicks performed with the dominant and non-dominant limb. Biomedical Human Kinetics, 2019. 11(1): p. 193-197. [DOI:10.2478/bhk-2019-0027]
4. Jung, D.-Y., E.-K. Koh, and O.-Y. Kwon, Effect of foot orthoses and short-foot exercise on the cross-sectional area of the abductor hallucis muscle in subjects with pes planus: a randomized controlled trial 1. Journal of back and musculoskeletal rehabilitation, 2011. 24(4): p. 225-231. https://10.3233/BMR-2011-0299 [DOI:10.3233/BMR-2011-0299] [PMID]
5. MacDonald, G.Z., et al., An acute bout of self-myofascial release increases range of motion without a subsequent decrease in muscle activation or force. The Journal of Strength & Conditioning Research, 2013. 27(3): p. 812-821.https://10.1519/JSC.0b013e31825c2bc1 [DOI:10.1519/JSC.0b013e31825c2bc1] [PMID]
6. Barnamehei, H., M. Kharazi, and M. Safaei, KINEMATICS COMPARISON OF TWO COMMON DIFFERENT GUARD IN TAEKWONDO AP DOLLIO CHAGI. ISBS Proceedings Archive, 2017. 35(1): p. 13
7. ADI, N.H., Analisis Gerakan Tendangan Ap Chagi Pada Taekwondoin junior Putra Kabupaten lombok Timur. Journal of Physical Education Health and Sport, 2016. 3(2). [DOI:10.15294/jpehs.v3i2.6466]
8. Melekoğlu, T. and A. Işın, The Relationship Between Football Participation Level and Lower Leg Alignment in Youth Males: Genu Varum. Journal of Education and Training Studies, 2019. 7(2): p. 137-141. [DOI:10.11114/jets.v7i2.3955]
9. Lee, H.-I. and B.-O. Lim, Effects of Self Myofascial Release, Elastic Band, and Stretching Exercises on Lower Extremity Alignment and Gait in Female Genu Varum. 한국운동역학회지, 2018. 28(4): p. 207-211
10. Kim, T.-W., et al., Kicking modality during erratic-dynamic and static condition effects the muscular co-activation of attacker. Journal of Sports Sciences, 2017. 35(9): p. 835-841. [DOI:10.1080/02640414.2016.1192672] [PMID]
11. Yu, B.-K. and E.-H. Kim, The effects of the correction exercise program combined with stretching and elastic band exercise on femoral intercondylar distance, Q-angle, plantar pressure in undergraduate with genu varum. Journal of the korea academia-industrial cooperation society, 2015. 16(3): p. 2064-2072. [DOI:10.5762/KAIS.2015.16.3.2064]
12. Mailapalli, D.R., J. Benton, and T.W. Woodward, Biomechanics of the taekwondo axe kick: a review. Journal of Human Sport and Exercise, 2015. 10(1): p. 141-149.https://10.14198/jhse.2015.101.12 [DOI:10.14198/jhse.2015.101.12]
13. Daneshjoo A, Raeisi S. The Effect of Eight Weeks Plyometric Training on Kinematical Parameters, Agility, Linear Jump and BMI of Elite Parkour Athletes. J Sport Biomech.2020; 6 (1) URL: http://biomechanics.iauh.ac.ir/article-1-217-fa.html
14. Yildiz, A., A Combined Study of Selective Technique; Some Kick and Combat Techniques in Creating Parenteral Knee Complication in Professional Male Taekwando. Experimental Brain Research; , 2019: p. 336-341
15. Bikee, F., et al., The Effect of 6 Weeks of Exercise on Knee Kinematics and Balance in Students with Parenteral Knee. Public Health, 2015. 107(6)
16. Jafari, H., S. Noori, and N. Nabavi, The Effect of Corrective Exercises on Parenteral Knee and Functional Muscle Disorders in Athletes. Journal of Research in Sport Rehabilitation, 2012. 1(2): p. 65-74
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