Effects of two football stud configurations on biomechanical characteristics of single-leg landing and cutting movements on infilled synthetic turf

摘要

Multiple playing surfaces and footwear used in American football warrant a better understanding of relationship between different combinations of turf and footwear. The purpose of this study was to examine effects of shoe and stud types on ground reaction force (GRF) and ankle and knee kinematics of a 180 degrees cut and a single-leg 90 degrees land-cut on synthetic turf. Fourteen recreational football players performed five trials of the 180 degrees cut and 90 degrees land-cut in three shoe conditions: non-studded running shoe, and football shoe with natural and synthetic turf studs. Variables were analyzed with a 3x2 (shoexmovement) repeated measures analysis of variance (p<0.05). Peak vertical GRF (p<0.001) and loading rate (p<0.001) were greater during 90 degrees land-cut than 180 degrees cut. For 180 degrees cut, natural turf studs produced smaller peak medial GRFs compared to synthetic turf studs and non-studded shoe (p=0.012). For land-cut, peak eversion velocity was reduced in running shoes compared to natural (p=0.016) and synthetic (p=0.002) turf studs. The 90 degrees land-cut movement resulted in greater peak vertical GRF and loading rate compared to the 180 degrees cut. Overall, increased GRFs in the 90 degrees land-cut movement may increase the chance of injury.