History- When an athlete falls, the impact is absorbed by a combination of the playing surface and the athletes body. The "harder" the surface, the greater the amount of the impact absorbed by the player's body. This is an on going issue when it comes to head injuries on the playing surface. Concussions could be quite detrimental to athletic performance. These most often occur when the athletes head hits the playing surface. Typically, individual concussions are mild and the effects have are short lived. In the case of multiple concussions, the effects can be cumulative and the consequences can be long lasting and in some cases permanent. Additionally, if a player has already experienced one concussion, they are more likely to experience another
Impact testing (commonly referred to as g-max testing) measures the "Negative deceleration" of impacts on the field. The Gmax can show the performance of sports surfaces - including synthetic (artificial) turf and natural turf athletic fields. The higher the g-max value, the lower amount of force the surface is absorbing and the faster the impact decelerates. This causes a higher risk factor for injuries on the field. Measuring impact-attenuation is a fundamental tool of athletic field safety testing. Read It Here "Surface Hardness (Gmax) Method." Center for Turfgrass Science (Penn State University). N.p., n.d. Web. 16 Dec. 2013.