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Head Impact Exposure in Youth Football Players Ages 7-8 Years And Effect of Returning Players

 

 

Comparison of head impact exposure across various level of play[2,5-7]

     Linear acceleration   (g)  Rotational acceleration   (rad/s2)
Level of Play
Number of impacts per season
Median (50% below and 50% above)
95%
Median (50%)
 95%
Youth (7-8 years)[1]  107  15  40  671  2347
Youth (7-8 years)[2]   161  16  38  686  2052
Youth (9-12 years)[3]  240  18  43  856  2034
High school (14-18 years)  565  21  56  903  2527
College (19-23 years)  1000  18  63  981  2975

 

Footnotes

Broglio, S. P., T. Surma, and J. A. Ashton-Miller. High school and collegiate football athlete concussions: a biomechanical
review. Ann. Biomed. Eng. 2012;40(1):37-46.

6. Rowson, S., and S. M. Duma. Development of the star evaluation system for football helmets: integrating player
head impact exposure and risk of concussion. Ann. Biomed. Eng. 2011;39(8):2130-2140.

7. Rowson, S., S. M. Duma, J. G. Beckwith, J. J. Chu, R. M. Greenwald, J. J. Crisco, P. G. Brolinson, A. C. Duhaime,
T. W. McAllister, and A. C. Maerlender. Rotational head kinematics in football impacts: an injury risk function for
concussion. Ann. Biomed. Eng. 2012;40(1):1-13