The Biomechanics of Throwing a Football Tasi Kelemete
+ The Biomechanics of Throwing a Football Tasi Kelemete
+ Grip n Determine movement and release n Finger in flexion over the laces n Space between ball and pocket of the hand n Wrist in extension n Shoulder at 90 degrees, elbow at 45 degrees flexion
+ Stance n Shoulder n Feet perpendicular to target shoulder width apart n Non-dominant n Hip leg in plantar flexion externally rotated n Transfer n Front of weight for power toe point to target
+ Throw n Ball placed beside the ear, thrown in a forward sagittal plane n Non-dominant hand as guide, release midway through throw and come in hyperextension past the body n Force X mass = acceleration n Arm full extension, should going from external to internal rotation n Wrist and fingers in flexion and end at opposite hip
+ Subject 1
+ Subject 1
+ Subject 1
+ Subject 2
+ Subject 2
+ Subject 2
+ Subject 3
+ Subject 3
+ Subject 3
+ Comparison Table 1 Subject Age Height Weight Subject #1 14 years old 5’ 9” 195 lbs Subject #2 17 years old 6’ 1” 198 lbs Subject #3 19 years old 5’ 10” 199 lbs
+ Comparison Cont. Table 2 Subject Step Length Wind-up Angle Release Angle Back-swing Angle Subject #1 39. 61 inches 91. 7 degrees 143. 6 degrees 10. 3 degrees Subject #2 28. 48 inches 75. 8 degrees 127. 6 degrees 22. 9 degrees Subject #3 31. 42 inches 55. 2 degrees 121. 7 degrees 25. 9 degrees
+ Qualitative Comparisons n n Subject 1 n Full extension, no bend in knees n Dragged leg n No follow through n Didn’t come across his body Subject 2 and Subject 3 n Very similar in throw and style n Could explain in detail
+ References n Escamill, R. F. (2009). shoulder muscle recruitment patterns and related biomechanics during upper extremity sport. Sport Medicine, 39(7), Retrieved from http: //web. ebscohost. com/ehost/pdfviewer? sid=ea 4111 e 4 -4 ccb-4581 -b 159 ad 15 f 8346 bac%40 sessionmgr 14&vid=4&hid=21 n Football Biomechanics. (2009). Sport Science Info. Retrieved from https: //sites. google. com/site/sportsscienceinfo/home/football n Hall, S. J. (2012). Bio Mechanics. (6 ed. ). Columbus, OH: Mc. Graw-Hill. n Haywood, K. (2008). Life span motor development. (5 th ed. , pp. 144 -155). Champaign, Illinois : Thomson-Shore, Inc. n Krishnan, S. G. , Hawkins, R. J. , & Warren, R. F. (2004). The shoulder and the overhead athlete (pp. 318 -339). n Layden, T. (2010). The Art of the Pass. Sports Illustrated. Retrieved from http: //si. com/vault/article/magazine/MAG 1176714/index. htm
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