نوع مقاله : مقاله پژوهشی
نویسندگان
1 استادیار، دانشکده تربیت‌بدنی و علوم ورزشی، دانشگاه خوارزمی، تهران، ایران.
2 استاد تمام، دانشکده تربیت‌بدنی و علوم ورزشی، دانشگاه خوارزمی، تهران، ایران.
3 استادیار، دانشکده فنی و مهندسی، دانشگاه خوارزمی، تهران، ایران.
چکیده
زمینه و هدف: پرش عمودی در بسیاری از فعالیت های ورزشی دیده می شود و به عنوان یک مدل تحقیقی در بسیاری از مطالعات بیومکانیکی مورد استفاده قرار می گیرد. هدف از این مطالعه بررسی تاثیر چهار هفته تمرین بر تغییرپذیری نیروهای عکس العمل در اجرای پرش عمودی در مردان جوان فعال بود. روش تحقیق: در این تحقیق نیمه تجربی 20 مرد جوان در دو گروه تمرین و کنترل شرکت کردند. داده های نیروی عکس العمل زمین قبل و بعد از برنامه تمرینی با استفاده از دستگاه صفحه نیرو سنج در اجرای پرش عمودی ثبت شد. با استفاده از روش نمودار اثر کلی، ضریب تغییرات 10 نمودار نیروی عکس العمل زمین قبل و بعد از تمرین برای هر آزمودنی محاسبه شد. یافته ها: نتایج تحلیل واریانس با اندازه گیری مکرر تفاوت معنی داری را بین میزان ضریب تغییرات نیروی عکس العمل زمین در راستای عمودی و داخلی- خارجی پیش آزمون و پس آزمون نشان نداد، در حالی که در راستای قدامی- خلفی میانگین ضریب تغییرات در پس آزمون بیشتر از پیش آزمون بود (0/03=p). نتیجه گیری: به نظر می رسد تغییرپذیری نمودار نیروی عکس العمل زمین از تمرین تاثیر می پذیرد. مطالعه تغییرپذیری در نمودار نیروی های عکس العمل زمین می تواند به عنوان شاخص عملکرد در پرش عمودی در نظر گرفته شود.
کلیدواژه‌ها
عنوان مقاله [English]
Effect of 4 weeks training on variability of Ground Reaction Forces during vertical jump in active young men
نویسندگان [English]
- Mehdi Khaleghi Tazeji 1
- Heydar Sadeghi 2
- Raghad Mi'mar 1
- Seyyed Ali Asghar Hosseini 3
1 Assistant Professor, Department of Physical Education & Sport Sciences, Kharazmi University, Tehran, Iran.
2 Professor, Department of Physical Education & Sport Sciences, Kharazmi University, Tehran, Iran.
3 Assistant Professor, Department of Mechanical Engineering, Faculty of Engineering, Kharazmi University, Tehran, Iran.
چکیده [English]
Background and Aim: Vertical jump is seen in many sports activities and it use in many biomechanical researches. The purpose of this study was to investigate the effect of four weeks training on variability of Ground Reaction Forces (GRF) during vertical jump in active young men. Materials and Methods: Twenty young men (Exercise group: agd: 21.20 ± 1.47 yrs., Height: 170±6 cm, Weight: 65.21±10.92 kg and Control group: age: 19.85±0.69 yrs, Height: 177±71 cm, Weight: 67.77±11.59 kg) participated in this study. GRF data were recorded before and after training protocol using force plate during the vertical jump maneuver. Coefficient of variation (CV) was calculated in 10 GRF curves pre and post training protocol for each subject using mean ensemble curve method. Results: The results of repeated measure showed no significant differences in CV in Mediollateral and vertical GRFs but Significant differences was observed in Anteroposterior GRF (p≤0.05). Conclusion: It seems GRF variability is influenced by exercise. The variability in the GRF can be considered as an indicator of performance in the vertical jump.
کلیدواژه‌ها [English]
- Variability
- GRF
- Vertical jump
Bobbert, M., & Van Soest, A. J. (2001). Why do people jump the way they do? Exercise Sport Science, 29(3), 95-102.
Brown, C., Bowser, B., & Simpson, K. J. (2012). Movement variability during single leg jump landings in individuals with and without chronic ankle instability. Clinical Biomechanics, 27, 52-63.
De Villarreal, E. S. S., Kellis, E., Kraemer, W. J., & Izquierdo, M. (2009). Determining variables of plyometric training for improving vertical jump height performance: a meta-analysis. The Journal of Strength and Conditioning Research, 23(2), 495-506.
Dounskaia, N. (2007). Kinematic invariants during cyclical arm movements. Biological Cybernetics, 96(2), 147-163.
Dowelling, J. J., & Vamos, L. (1993). Identification of kinetic and temporal factors related to vertical jump performance. Journal of Applied Biomechanics, 9(2), 95-110.
Faigenbaum, A. D., McFarland, J. E., Keiper, F. B., Tevlin, W., Ratamess, N. A., & Kang, J. (2007). Effects of a short-term plyometric and resistance training program on fitness performance in boy’s age 12 to 15 years. Journal of Sports Science and Medicine, 23(2), 495-506.
Floria, p., Gomez-Landero, L. A., & Harrison, A. (2014). Variability in the application of force during the vertical jump in children and adults. Journal of Applied Biomechanics, 30(6), 679-84.
Gheller, R. G., Pupo, J. D., De Lima, L. A. P., De Moura, B. M., & Santos, S. G. D. (2014). Effect of squat depth on performance and biomechanical parameters of countermovement vertical jump. Rev Bras Cineantropom Desempenho Hum. 16(6), 658-668.
Hamill, J., McDermott, W. J., & Haddad, J. M. (2000). Issues in quantifying variability from a dynamical systems perspective. Journal of Applied Biomechanics, 16, 407-418.
Harrison, A., Ryan, W., & Hayes, K. (2007). Functional data analysis of joint coordination in the development of vertical jump perfomance. Sports Biomechanics, 6(2), 199-214.
Hasson, C., Dugan, E. L., Doyle, T. L., Humphries, B., & Newton, R. U. (2004). Neuromuscular strategies employed to increase jump height during the initiation of the squat jump. Journal of Electromyography & Kinesiology, 14, 515-521.
Hochmuth, G. (1984). Biomechanics of athletic movement. Berlin: Sportverlag.
James, C. R., Bates, B. T., & Dufek, J. S. (2003). Classification and comparison of biomechanical response strategies for accommodating landing impact. Journal of Applied Biomechanics, 19(2):106-18.
Jaric, S., Ristanovic, D., & Corcos, D. M. (1989). The relationship between muscle kinetic parameters and kinematic variables in a complex movement. European Journal of Applied Physiology and Occupational Physiology, 59(5), 370-376.
Kang, H. G. (2007). Kinematic and motor variability and stability during gait: effects of age, walking speed and segment height. PhD Thesis, The University of Texas at Austin.
Kelso, J., & Ding, M. (1993). Fluctuations, intermittency, and controllable chaos in biological coordination. Variability and Motor Control, 291-316.
Kotzamanidis, C. (2006). Effect of plyometric training on running performance and vertical jumping in prepubertal boys. The Journal of Strength and Conditioning Research, 20(2), 441-5.
Kubo, K., Morimoto, M., Komuro, T., Yata, H., Tsunoda, N., & Kanehisa, H. (2007). Effects of plyometric and weight training on muscle-tendon complex and jump performance. Medicine & Science in Sports & Exercise, 39(10), 1801-10.
Latash, M. L. (2008). Synergy. Oxford University Press.
Linthorne, N. P. (2001). Analysis of standing vertical jumps using a force platform. American Journal of Physical Therapy, 69(11), 198-204.
McBride, J. M., Triplett McBride, T., Davie, A., Newton, R. U. (2002). The effect of heavy vs. light-load jump squats on the develoment of strenght, power, and speed. The Journal of Strength & Conditioning Research. 16(1), 82-75.
Miller, D., & East, D. J. (1976). Kinematic and kinetic correlates of vertical jumping in women. In: Komi PV, editor Biomechanics V-B Baltimore, MD: University Park Press, 65-72.
Newell, K. M., & Corcos, D. M. (1993). Issues in variability and motor control. Variability and Motor Control, 1-12.
Newell, K. M., & Slifkin, A. B. (1998). The nature of movement variability. Motor Behavior and Human Skill: A multidisciplinary Approach, 143-60.
Oddsson, L. (2008). What factors determine vertical jumping height? 5 International Symposium on Biomechanics in Sports (1987), 393-401.
Panoutskopoulos, V., Papachatzis, N., & Kollias, I. A. (2014). Sport specifity background affects the principal component structure of vertical jump performance of identifying performance enhancement interventions. Journal of Sports & Health Science, 1-9.
Park, G. (2005). The use of intra-subject variability as a means of identifying performance. MS.c Biomechanics, Thesis School of Health and Human Performance, Dublin City University.
Pratoni, E., Hamill, J., Hayes, K., Van Emmerik, R. E., Wilson, C., & Rodano, R. (2013). Movement variability and skills monitoring in sports. Sports Biomechanics, 12(2), 69-92.
Prilutsky, B., & Zatsiorsky., V. M. (1994). Tendon action of two joint muscles: transfer of mechanical energy between joints during jumping, landing and runing. Journal of Biomechanics, 27(1), 25-34.
Robertson, D., & Fleming, D. (1987). Kinetics of standing broad and vertical jumping. Canadian Journal Sports Sciences, 12(1), 19-23.
Schmidt, R. A., Zelaznik, H., Hawkins, B., Frank, J. S., & Quinn, J. T. (1979). Motor output variability: a theory for the accuracy of rapid motor acts. Psychological Review, 86(5), 415-451.
Stergiou, N. (2004). Innovative analysis of human movement. Champaign. IL: Human Kinetic; 29-87.
Temfemo, A., Hugues, J., Chardon, K., Mandengue, S. H., & Ahmaidi, S. (2009). Relationship between vertical jumping performance and anthropometric charactristics growth in boys and girls. European Journal of Pediatric, 168(4), 457-464.
Tomika, M., Owings, T. M., & Grabiner, M. D. (2001). Lower extremity strength and coordination are independent contributors to maximum vertical jump height. Journal of Applied Biomechanics, 17, 181-187.
Van der Steen, M. M. C., & Bongers, R. M. (2001). Joint angle variability and covariation in a reaching with a rod task. Experimental Brain Researchs, 208, 411-422.
Van Emmerik, R. E., & Van Wegan, E. E. (2000). On variability and stability in human movement. Journal of Applied Biomechanics, 16, 394-406.
Whiting, H. T. A. (1983). Human motor actions: Bernstein reassessed. North Holland: Elsevier.
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