![]() In addition, it was noted that water absorption by soccer balls can result in masses that substantially increase impact force and quickly surpass the NCAA weight limit for game play. Adjustments to ball parameters could reduce a high cumulative peak translational acceleration soccer athlete down into a previously defined safer low loading range. ![]() Reasonable reductions in allowable ball parameters resulted in a 19.7% decrease in peak impact force. These data were used, in conjunction with dimensional analysis to relate impact force to ball size, mass, velocity, and pressure. Impact force was measured with a force plate and ball velocity was determined using motion capture. A total of six hundred trials were performed on size 4 and 5 soccer balls as well as a novel lightweight soccer ball. To provide a more complete understanding of head trauma in soccer athletes, this study characterized the effects of four soccer ball characteristics (size, inflation pressure, mass, velocity) on the resulting peak impact force as it relates to the potential for incurring neurophysiological changes. This is in part due to players purposely using their head to direct the ball during play. It has been documented that up to 22% of all soccer injuries are concussions.
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