- Football governing bodies FIFA/NCAA govern the size, weight limit and inflated pressure of footballs. Purdue University engineers have concluded that when footballs get wet, they quickly breach the weight limit, so should be swapped out mid-game. Inflating balls to the lowest allowable pressure can reduce its force by 20%. Adopting these measures could reduce concussion risk, which account for 22% of all soccer injuries. A professional player heads the ball 12 times in a single game and 800 times in a season.
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