YILDIZ MİLLİ VOLEYBOLCULARIN DÜŞEREK SIÇRAMADA YERLE TEMAS SÜRELERİ VE DÜŞME YÜKSEKLİĞİNİN GÜÇ VE İŞ ÇIKTILARINA ETKİLERİ
Abstract
Çalışmanın amacı genç erkek voleybolcuların düşerek sıçrama performanslarında ortaya koyulan iş ve güç kapasitelerinin yerle temas süreleri ve düşme yüksekliklerine göre incelenmesidir. Çalışmaya dahil edilen 13 milli voleybolcu Xyaş=15.9±0.5 yıl 20, 40 ve 60 santimetre yüksekliklerindeki kutulardan düşerek sıçrama uygulamışlardır. Voleybolculara her kutu yüksekliği için a “Sıçraya bildiğin kadar yukarıya sıçra” b “Önceki sıçramandan çok daha hızlı olarak en yükseğe sıçra” talimatları verilmiştir. Her bir kutu yüksekliğinde yapılan ikişer denemeden elde edilen değişkenler; normal temas süresi NT ve kısa temas süresi KT şeklinde oluşturulmuştur. Elde edilen güç ve yapılan iş değerlerinin temas sürelerine göre farklılıkları ilişkili örneklemler için t-test ile, üç farklı kutu yüksekliğine göre değişimleri ise tekrarlı ölçümlerde ANOVA ile analiz edilmiştir. Her bir atlama yüksekliğinde yapılan atlamalarda kısa temas ve normal temas süreleri arasında istatistiksel olarak anlamlı farklar bulunurken, kutu yüksekliğine bağlı yapılan yerle temas sürelerinde anlamlı farklılık görülmemiştir. Çalışma sonuçları, düşme yüksekliğinin yerle temas sürelerine etki etmediğini ancak maksimum rölatif yapılan iş ve güç değerlerinde farklar oluşturduğunu göstermiştir. KT sırasındaki sıçramalar tüm kutu yükseklilerinde NT sıçramalara göre daha fazla göreceli güç W/kg üretmiş, ve yine 40 ve 60cm yüksekliklerinde KT sıçramalarının yerle temas süresi boyunca NT gruba oranla daha fazla iş J/kg ortaya koydukları görülmüştür.
Keywords
References
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- Peng, H. T., Kernozek, T. W., & Song, C. Y., “Quadricep and Hamstring Activation during Drop Jumps with Changes in Drop Height.” Physical Therapy in Sport. 12.3. pp.127–132. 2011.
- Ruan, M., & Li, L., “Approach Run
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- B. P., & Paine, D., “Ankle Biomechanics
- Techniques.” Medicine and Science in
- Sports and Exercise. 33.8. pp.1338–1344. 2001. Four Landing
- Walsh, M., Arampatzis, A., Schade, F., & Brüggemann, G. P.,“The Effect of Drop Jump Starting Height and Contact Time on Power, Work Performed, and Moment of Force.” The Journal of Strength & Conditioning Research. 18.3. pp.561–566. 2004.
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- and Performance in the Triple Jump: A Cross-Sectional Analysis.” Journal of Applied Biomechanics. 11.1. pp.81–102. 1995.
THE EFFECT OF GROUND CONTACT TIME AND DROP HEIGHT ON WORK AND POWER OUTPUTS FOR DROP JUMP IN YOUTH TURKISH NATIONAL VOLLEYBALL PLAYERS
Abstract
The aim of the study is to investigate the work and power capacities of drop jump performances according to drop jump height and contact time durations in Youth Turkish National volleyball players.13 national volleyball players Xage=15.9±0.5 years performed a series of drop jumps from heights of 20, 40, and 60cm. Two instructions, a ‘‘jump as high as you can’’ and b ‘‘jump high faster than your previous one’’, were given to the participants for each box heights. Two variables determined as moderate ground contact time MC and the shorter ground contact time SC . Paired-Sample T-test was conducted to analyze the differences in power and work outputs in terms of contact time durations and RepeatedMeasured ANOVA was also used to determine the differences according to box heights. While there were statistically significant differences between SC and MC in jumps performed for each drop heights, there was no significant difference in contact times according to box heights. The results of the study showed that drop height did not affect the contact times but made differences in maximum relative work and power. SC produced greater relative power than MC at all drop heights and greater relative works at 40 and 60cm box heights throughout the contact time duration
References
- Atan, T., Taşmektepligil, M. Y., Ağaoğlu, S. A., Kabadayı, M., Bostancı, Ö., & İmamoğlu, O., “Drop Sıçramada Optimal Platform Selçuk Üniversitesi Beden Eğitimi ve Spor Bilim Dergisi. 13.2. pp.160–165. 2011. [In Turkish]. Belirlenmesi.”
- Ball, N. B., Stock, C. G., & Scurr, J. C., “Bilateral Contact Ground Reaction Forces and Contact Times during Plyometric Drop Jumping.” The Journal of Strength & Conditioning Research. 24.10. pp.2762– 2769. 2010.
- Behm, D. G., Wahl, M. J., Button, D. C., Power, K. E., & Anderson, K. G., “Relationship between Hockey Skating Speed Measures.” Journal of Strength and Conditioning Research. 19.2. pp.326. 2005. Performance
- Bobbert, M. F., “Drop Jumping as a Training Method for Jumping Ability.”Sports Med. 9.1. pp.7–22. 1990.
- Bobbert, M. F., Huijing, P. A., & Van Ingen Schenau, G. J., “Drop Jumping. II. The Influence of Dropping Height on the Biomechanics of Drop Jumping.”Medicine Science Sports Exercise. 19.4. pp.339– 346. 1987.
- Bobbert, M. F., Huijing, P. A., & van Ingen Schenau, G. J., “Drop Jumping. I. The Influence of Jumping Technique on the Biomechanics of Jumping.” Medicine and Science in Sports and Exercise. 19.4. pp.332–338. 1987.
- Clutch, D., Wilton, M., McGown, C., & Bryce, G. R.,“The Effect of Depth Jumps and Weight Training on Leg Strength and Vertical Jump.” Research Quarterly for Exercise and Sport. 54.1. pp. 5–10. 1983.
- Goss-Sampson, M., Alkureishi, R., & Price, M.,“Optimum Contact Time and the Amortization Phase in the Bounce Drop Jump.” PART I: BIOMECHANICS, Journal of Sports Sciences. 20.3-74. pp.8. 2002.
- Gulick, D. T., Fagnani, J., Long, M., Morris, K., Hartzell, B., & Epler, M., “Parameters That Influence Vertical Jump Height.” The Sport Journal. 11.3. 2008.
- Hoffren, M., Ishikawa, M., & Komi, P. V., “Age-Related Neuromuscular Function during Drop Jumps.” Journal of Applied Physiology. 103.4. pp.1276–1283. 2007.
- Kellis, E., Arabatzi, F., & Papadopoulos, C., “Muscle Co-Activation around the Knee in Drop Jumping Using the Co-Contraction Index.” Journal of Electromyography and Kinesiology. 13.3. pp.229–238. 2003.
- Peng, H. T., Kernozek, T. W., & Song, C. Y., “Quadricep and Hamstring Activation during Drop Jumps with Changes in Drop Height.” Physical Therapy in Sport. 12.3. pp.127–132. 2011.
- Ruan, M., & Li, L., “Approach Run
- Increases Preactivation and Eccentric Phases Muscle Activity during Drop Jumps from Different Drop Heights.” Journal of Electromyography and Kinesiology. 20.5. pp.932–938. 2010. 14. Self
- B. P., & Paine, D., “Ankle Biomechanics
- Techniques.” Medicine and Science in
- Sports and Exercise. 33.8. pp.1338–1344. 2001. Four Landing
- Walsh, M., Arampatzis, A., Schade, F., & Brüggemann, G. P.,“The Effect of Drop Jump Starting Height and Contact Time on Power, Work Performed, and Moment of Force.” The Journal of Strength & Conditioning Research. 18.3. pp.561–566. 2004.
- Yu, B., & Hay, J. G., “Angular Momentum
- and Performance in the Triple Jump: A Cross-Sectional Analysis.” Journal of Applied Biomechanics. 11.1. pp.81–102. 1995.
Details
| Primary Language | Turkish |
|---|---|
| Journal Section | Research Article |
| Authors | |
| Publication Date | December 1, 2017 |
| Published in Issue | Year 2017 Volume: 11 Issue: 3 |