Keith Davids is a professor of motor learning at Sheffield Hallam University/Sport and Human Performance research group, where he leads the study of motor skills, expertise and talent development. His research program, theoretically supported on ecological dynamics, investigates the effect of constraints on coordination tendencies in athletes and sports teams classified as nonlinear dynamic systems. The ideas of ecological psychology and nonlinear dynamics have been applied in practical settings in sport in the form of a nonlinear pedagogy.