Line graph showing mean (SEM) values for ankle pain on activity for intermittent and standard groups at baseline and week 1, 2, 3, 4, and 6 after injury. Line graph showing mean (SEM) values for ankle pain on activity for intermittent and standard groups at baseline and week 1, 2, 3, 4, and 6 after injury. Values for the interaction time × group (within subject factor = time; between subject factor = treatment group): F = 4.292; df = 3.152; df error = 340; p = 0.005. Degrees of freedom were adjusted using Greenhouse-Geisser’s procedure. The p value indicates significant interaction. VAS, Visual analogue scale. C M Bleakley et al. Br J Sports Med 2006;40:700-705 Copyright © BMJ Publishing Group Ltd & British Association of Sport and Exercise Medicine. All rights reserved.