Influence of Rubber Particle Density in Soccer Artificial Turf on Performance and Injure

Objective:To reveal the influence of rubber particles density in soccer artificial turf on performance of cutting and accelerated starting movement,to analyze the possible risk of injure through biomechanical data.Methods:13 male soccer players participated in the study,three different particle densities in artificial turf were used,collecting the data of kinematic and kinetic during cutting and accelerated starting movement.Results:With the increase in particle density,the traction of shoe-turf interaction increased.During the braking phase at cutting movement,the peak ground reaction force and loading rate increased.And at the moment of the first peak GRF,the GRF components in vertical and posterior directions and knee extention moment increased,on the contrary,knee adduction moment and knee abduction angle decreased in terms of the increase of filling density.During the stretching phase in cutting movement,the GRF components increased.There is no significant difference found the acceleration of COM during accelerated starting.Conclusion:The density of rubber particles in artificial turf plays a significant role in the traction of shoe-turf interaction,the traction increases on the basis of the increase of rubber particles density.Under the condition of normal running speed,the increase of the traction can provide the capacity of braking and propulsion very well,which won't affect sports performance on accelerated starting.The increase of the traction of shoe-turf interaction will lead to the increase of peak GRF and loading rate during cutting breaking phase,meanwhile resulting in changes sensitive indicators of ACL injury in the moment of the peak GRF,which enhances the risk of injury.