The Biomechanics of Throwing a Football
description
Transcript of The Biomechanics of Throwing a Football
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The Biomechanics of Throwing a FootballTasi Kelemete
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+Grip
Determine movement and release Finger in flexion over the laces Space between ball and pocket of the hand Wrist in extension Shoulder at 90 degrees, elbow at 45 degrees
flexion
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+Stance
Shoulder perpendicular to target Feet shoulder width apart Non-dominant leg in plantar flexion Hip externally rotated Transfer of weight for power Front toe point to target
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+Throw
Ball placed beside the ear, thrown in a forward sagittal plane
Non-dominant hand as guide, release midway through throw and come in hyperextension past the body Force X mass = acceleration
Arm full extension, should going from external to internal rotation
Wrist and fingers in flexion and end at opposite hip
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+Subject 1
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+Subject 1
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+Subject 2
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+Subject 2
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+Subject 2
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+Subject 3
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+Subject 3
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+Subject 3
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+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
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+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
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+Qualitative Comparisons
Subject 1 Full extension, no bend in knees Dragged leg No follow through Didn’t come across his body
Subject 2 and Subject 3 Very similar in throw and style Could explain in detail
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+References
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/pdfviewer?sid=ea4111e4-4ccb-4581-b159-ad15f8346bac%40sessionmgr14&vid=4&hid=21
Football Biomechanics. (2009). Sport Science Info. Retrieved from https://sites.google.com/site/sportsscienceinfo/home/football
Hall, S. J. (2012). Bio Mechanics. (6 ed.). Columbus, OH: McGraw-Hill. Haywood, K. (2008). Life span motor development. (5th ed., pp. 144-
155). Champaign, Illinois : Thomson-Shore, Inc. Krishnan, S. G., Hawkins, R. J., & Warren, R. F. (2004). The shoulder and
the overhead athlete (pp. 318-339). Layden, T. (2010). The Art of the Pass. Sports Illustrated. Retrieved from
http://si.com/vault/article/magazine/MAG1176714/index.htm