نوع مقاله : مقاله پژوهشی

نویسندگان

1 استادیار رفتار حرکتی، گروه تربیت بدنی، واحد علی‌آباد کتول، دانشگاه آزاد اسلامی، علی‌آباد کتول، ایران

2 استاد رفتار حرکتی، دانشگاه لوکزامبورگ

چکیده

هماهنگی اندام­های بدن درطول اجرای مهارت پرتاب بیسبال و زمان­بندی اجرای فازهای مختلف حرکت، به‌طورکامل شناخته‌شده نیست. هدف پژوهش حاضر، توصیف هماهنگی درون­عضوی و زمان­بندی اجرای مهارت پرتاب بیسبال با تأکید بر فازهای شش‌گانة آن در پرتابگر ماهر و مقایسة آن‌ها با پرتابگران مبتدی بود. شرکت­کننده­های پژوهش شامل هشت پرتابگر مبتدی و یک پرتابگر ماهر بودند. هماهنگی درون­عضوی شامل هماهنگی بین مفاصل شانه و آرنج بود که با استفاده از نمودارهای زاویه- زاویه نمایش داده شد. نقاط شروع و پایان پرتاب­ها با استفاده از روش درون­یابی خطی یکسان­سازی شدند و به 250 نقطة زمانی نرمالیزه شدند. زمان­بندی، زاویة ابتدا و انتهای هر فاز و حداقل و حداکثر زاویة مفاصل شانه و آرنج در هر فاز، در پرتابگران مبتدی با ماهر مقایسه شدند. نتایج نشان داد که تفاوت نسبتاً آشکاری بین پرتابگران ماهر و مبتدی در هماهنگی درون‌‌عضوی مفاصل شانه- آرنج به‌خصوص در فازهای ابتدایی آغاز و گام وجود دارد. همچنین، تفاوت قابل­ملاحظه­ای بین پرتابگران مبتدی با پرتابگر ماهر در زوایای ابتدایی، انتهایی و حداقل و حداکثر زاویة ایجادشده در مفاصل شانه و آرنج در فازهای مختلف حرکت وجود دارد. همچنین، پرتابگران مبتدی کل مهارت و فازهای اول، چهارم و پنجم را در زمان کمتری نسبت به پرتابگر ماهر اجرا می‌کنند. دربارة نتایج پژوهش با توجه به ویژگی­های فضایی- زمانی اجرای مهارت پرتاب بیسبال در پرتابگران ماهر و مبتدی و ملاحظات کاربردی آن درزمینة بهبود مهارت و جلوگیری از آسیب بحث شده است.  

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Comparing Intra-Limb Coordination and Timing of Performing a Baseball-Pitch in Skilled and Unskilled Pitchers with Emphasis on Different Movement Phases

نویسندگان [English]

  • Saeed Ghorbani 1
  • Andreas Bund 2

1 Assistant Professor of Motor Behavior, Department of Physical Education, Aliabad Katoul Branch, Islamic Azad University, Aliabad Katoul, Iran

2 Professor of Motor Behavior, University of Luxembourg

چکیده [English]

The coordination of body limbs and the timing during performing of a Baseball-pitch and its different movement phases are relatively unknown. The purpose of the present study was to describe and compare the coordination between the shoulder-elbow joints and timing during execution of a Baseball-pitch by skilled and unskilled subjects emphasizing movement phases. The subjects consisted of a skilled male pitcher and eight beginner pitchers. Intra-limb coordination was obtained for the shoulder-elbow joints and was shown by angle-angle plots. Start and end points of all pitchers were normalized by linear interpolation method to 250 points. Timing, angles of the beginning and end of each phase, and the minimum and maximum angles of shoulder and elbow joints in each phase were compared between skilled and unskilled pitchers. The results indicated that there is a relatively clear difference in the coordination patterns between the joints of the shoulder-elbow, especially in the first and second phases between skilled and unskilled pitchers. There were also many differences between unskilled pitchers with the skilled pitcher at the beginning and end as well as the minimum and maximum angles of shoulder and elbow joints in different phases. Considering the timing variable, the time of performing the whole movement and the first, fourth, and fifth phases in unskilled pitchers was significantly shorter than that of the skilled pitcher. The results were discussed with regard to spatiotemporal characteristics of the performing Baseball-pitch in skilled and unskilled pitchers. Also, were discussed practical considerations for improving skills and preventing injury.

کلیدواژه‌ها [English]

  • Baseball-Pitch
  • Intra-Limb Coordination
  • Timing
  • Movement Phase
  1. Murray TA, Cook TD, Werner SL, Schlegel TF, Hawkins RJ. The effects of extended play on professional baseball pitchers. Am J Sports Med. 2001;29(2):137-42.
  2. Fortenbaugh D, Fleisig GS, Andrews JR. Baseball pitching biomechanics in relation to injury risk and performance. J Athl Train. 2009;1(4):314-20.
  3. Fleisig GS, Andrews JR. Prevention of elbow injuries in youth baseball pitchers. Sports Health. 2012;4(5):419-24.
  4. Hurd WJ, Kaufman KR. Glenohumeral rotational motion and strength and baseball pitching biomechanics. J Athl Train. 2012;47(3):247-56.
  5. Meister K. Injuries to the shoulder in the throwing athlete part one: biomechanics/ pathophysiology/ classification of injury. Am J Sports Med. 2000;28(2):265-75.
  6. Whiteley R. Baseball throwing mechanics as they relate to pathology and performance-A Review. J Sports Sci Med. 2007;6:1-20.
  7. Fleisig GS, Escamilla RF, Andrews JR. Biomechanics of throwing. In: JE Zachazewski, DJ Magee, WS Quillen, editors. Athletic injuries and rehabilitation. Philadelphia, PA: WB Saunders Co; 1996. p. 332-53.
  8. Dillman CJ, Fleisig GS, Andrews JR. Biomechanics of pitching with emphasis upon shoulder kinematics. J Orthop Sport Phys. 1993;18:402-8.
  9. Pappas AM, Zawacki RM, Sullivan TJ. Biomechanics of baseball pitching: A preliminary report. Am J Sports Med. 1985;13(4):216-22.
  10. Werner SL, Fleisig GS, Dillman CJ, Andrews JR. Biomechanics of the elbow during baseball pitching. J Orthop Sports Phys Ther. 1993;17(6):274-8.
  11. Rojas IL, Provencher MT, Bhatia S, Foucher KC, Bach BR Jr, Romeo AA, et al. Biceps activity during windmill softball pitching: injury implications and comparison with overhand throwing. Am J Sports Med. 2009;37(3):558-65.
  12. Naeimikia M, Gholami A, Arabameri E. Effect of visual manipulation during walking training on functional balance and selected kinematic parameters of gait in older women. Mot Behav. 2013;13:41-56. (In Persian).
  13. Rajabi R, Mohammadpour S. The relationship between sagittal plane kinematics of trunk, knee and anterior tibial shear force during single-leg landing. Sci J Kurdistan Univ Med Sci. 2014;19(2):47-56. (In Persian).
  14. Hejazi Dinan P, Farahmann F, Mokhtarzadeh Salmasi H, Rezaeean H. Kinematic analysis of the Mae-Geri technique in Karate. Res Sports Rehabil. 2013;1(1):21-32. (In Persian)
  15. EntezariKhorasani Z, Farsi A, VaezMousavi MK, Abdoli B. The effect of skilled and learning model on accuracy and dynamic characteristics acquisition of basketball free throw skill. Mot Behav. 2018;10(31):65-82. (In Persian).
  16. Asadi A, Farsi AR, Abdoli B. Effect of increasing the distance of an external focus of attention on performance and kinematic of horizontal jump in skilled athletes. Mot Behav. 2016;8(23):65-78. (In Persian).
  17. Fazeli D, Moradi N. The effect of task constraint on learning of movement pattern and parameter during observational learning. Mot Behav. 2017;8(26):17-34. (In Persian).
  18. Tanabe H, Fujii K, Kouzaki M. Inter- and intra-lower limb joint coordination of non-expert classical ballet dancers. Hum Mov Sci. 2014;34:41-56.
  19. Bund A, Ghorbani S, Rathjens F. A Three-dimensional movement analysis of the spike in Fistball. Sports. 2016;4(4):55.
  20. Farsi A, Bahmanbegloo Z, Abdoli B, Ghorbani S. The effect of observational practice by a point-light model on learning a novel motor skill. Percep MotorSkill. 2016;123(2):477-88.
  21. Ghorbani S, Bund A. Observational learning of a new motor skill: The effect of highlighting relative motion information. Int J Sports Sci Coach. 2016;15(4):514-22.
  22. Wang YTFord HT, Ford HT, Shin DM. Three-dimensional kinematic analysis of baseball pitching in acceleration phase. Percep Motor Skill. 1995;80(1):43-8.
  23. Nissen C, Westwell M, Ounpuu S, Patel M, Tate J, Pierz K, et al. Adolescent baseball pitching technique: a detailed three-dimensional biomechanical analysis. Med Sci Sports Exerc. 2007;39:1347-57.
  24. Barrentine SW, Matsuo T, Escamilla RF, Fleisig GS, Andrews JR. Kinematic analysis of the wrist and forearm during baseball pitching. J Appl Biomech.1998;14(1):24-39.
  25. Escamilla RF, Fleisig GS, Barrentine SW, Zheng N, Andrews JR. Kinematic comparisons of throwing different types of baseball pitches. J Appl Biomech. 1998;14:1-23.
  26. Feltner M, Dapena J. Dynamics of the shoulder and elbow joints of the throwing arm during a baseball pitch. Int J Sport Biomech. 1986;2:235-59.
  27. Fleisig GS, Barrentine SW, Zheng N, Escamilla RF, Andrews JR. Kinematic and kinetic comparison of baseball pitching among various levels of development. J Biomech. 1999;32(12):1371-5.
  28. Matsuo T, Escamilla RF, Fleisig GS, Barrentine SW, Andrews JF. Comparison of 382 kinematic and temporal parameters between different pitch velocity groups. J Appl Biomech. 2001;17(1):1-13.
  29. Park SS, Loebenberg ML, Rokito AS, Zuckerman JD. The shoulder in baseball pitching: biomechanics and related injuries-part 1. Bull NYU Hosp Jt Dis. 2002; 61(1):268-79.
  30. Van Trigt B, Schallig W, van der Graaff D, Hoozemans M J M, Veeger D. Knee angle and stride length in association with ball speed in youth baseball pitchers. Sports. 2018;6:51.
  31. Oyama S. Baseball pitching kinematics, joint loads, and injury prevention. J Sport Health Sci.2012;1(2):80-91.
  32. Oyama SYu BBlackburn JTPadua DALi LMyers JB. Improper trunk rotation sequence is associated with increased maximal shoulder external rotation angle and shoulder joint force in high school baseball pitchers. Am J Sports Med. 2014;42(9): 2089-94.
  33. Fleisig GS, Andrews JR, Dillman CJ, Escamilla RF. Kinetics of baseball pitching with implications about injury mechanisms. Am J Sports Med. 1995;23:233-9.
  34. Chou PP, Huang Y, Gu Y, Liu C, Chen S, Hsu K, Wang R, Huang M, Lin H. Change in pitching biomechanics in the late-inning in Taiwanese high school baseball pitchers. J Strength Cond Res. 2015;29(6):1500-8.
  35. Escamilla RF, Barrentine SW, Fleisig GS, Zheng N, Takada Y, Kingsley D, Andrews JR. Pitching biomechanics as a pitcher approaches muscular fatigue during a simulated baseball game. Am J Sports Med. 2007;35(1):23-33.
  36. Nissen CW, Westwell M, Ounpuu S, Patel M, Solomito M, Tate J. A biomechanical comparison of the fastball and curveball in adolescent baseball pitchers. Am J Sports Med. 2009;37(8):1492-8.
  37. Wagner H, Pfusterschmeid J, Klous M, von Duvillard SP, Müller E. Movement variability and skill level of various throwing techniques. Hum Movement Sci. 2012;31(1):78-90.
  38. Davis JT, Limpisvasti O, Fluhme D, Mohr KJ, Yocum LA, Elattrache NS, et al. The effect of pitching biomechanics on the upper extremity in youth and adolescent baseball pitchers. Am J Sports Med. 2009;37(8):1484-91.
  39. Murata A. Shoulder joint movement of the non-throwing arm during baseball Pitch comparison between skilled and unskilled pitchers. J Biomech. 2001;34:1643-7.
  40. Iwase H, Murata A. Discussion on skillful baseball pitch using three-dimensional cinematographic analysis-comparison of baseball pitch between skilled and unskilled pitchers-IEEE International Conference on Systems, Man and Cybernetics. e-Systems and e-Man for Cybernetics in Cyberspace. 2001; Cat.No.01CH37236.
  41. Fleisig GS, Jameson EG, Dillman CJ, Andrews JR. Biomechanics of overhead sports. In: Garrett Jr WF, Kirkendall DT, editors. Exercise and sport science. Philadelphia: Lippincott, Williams & Wilkins; 2000. p. 563-584.
  42. Stodden DF, Fleisig GS, McLean SP, Andrews JR. Relationship of biomechanical factors to baseball pitching velocity: Within pitcher variation. J Appl Biomech. 2005;21:44-56.
  43. Urbin MA, Fleisig GS, Abebe A, Andrews JR. Associations between timing in the baseball pitch and shoulder kinetics, elbow kinetics, and ball speed. Am J Sports Med. 2013;31(2):336-42.
  44. Aguinaldo AL, Chambers H. Correlation of throwing mechanics with elbow valgus load in adult baseball pitchers. Am J Sports Med. 2009;37(10):2043-8.