Are these deficits the result of the pitch was intentional or the result of mild traumatic injuries as a result of head impacts other than the routine of pitching? DEVELOPMENT Football is a relatively safe with an injury rate one-fifth to half of football. (2) In Europe skull injuries are from 1 to 20% of all injuries in football (3) In a study of elite players in the 1993 Olympic Festival (4) 89% (64) of the men had had a history of episodes of concussion and 54% (39) of women. The authors estimated that over 10 years to play football the likelihood of a concussion was 50% for men and 22% in women. While head the ball properly executed was not responsible for any episode of concussion. Statistics from the National Collegiate Athletic Association (NCAA) indicate an average of 0.14 per 1000 athletic exposures for men and 0.15 in women (6) More recently, Boden et al. (5) (find more college football ratings at 0.50 and 0.40 for men and women. They found no shocks as a result of nodding the ball.

Football was classified as a contact sport by the American Academy of Pediatrics (6), and focused attention on the repetitive trauma to the head. suggesting that the deliberate use of the head to hit the ball may be analogous to repetitive blows to the head of the boxers (9) giving rise to syndromes appearance with signs of pyramidal, extrapyramidal and cerebellar and sometimes cognitive decline and personality changes. MECHANISM OF IMPACT impact mechanism is based on the relationship F = ma where F is the force of impact, m is the mass of the object and the acceleration of the object.