There is not much awareness about the influence of compliance with neuromuscular training (NMT) on the knee injury rate in football. With this in mind the authors conducted this study to investigate team and player compliance with an NMT programme in adolescent female football and to study the association between compliance and acute knee injury rates. They conducted a prospective cohort study based on a cluster randomised controlled trial on players aged 12-17 years with 184 intervention teams (2471 players) and 157 control teams (2085 players). Exposure and acute time loss knee injuries were recorded. Team and player compliance was recorded by the coaches on a player attendance form. The intervention group was separated into tertiles of compliance. Injury rates were compared by calculating rate ratios (RRs) and 95% CIs using exact Poisson tests with the low-compliance tertile as reference. Seasonal compliance trends were analysed using linear regression. Players in the high-compliance tertile had an 88% reduction in the anterior cruciate ligament (ACL) injury rate (RR 0.12, 95% CI 0.01 to 0.85), whereas the rate in the control group players was not significantly different from those in the low-compliance tertile (RR 0.77, 95% CI 0.27 to 2.21). A significant deterioration occurred in team (b=-3.0% per month, 95% CI -5.2 to -0.8) and player (b=-5.0% per month, 95% CI -7.1 to -2.9) compliance over the season.
Their study found that players with high compliance with the NMT programme had substantially reduced ACL injury rate compared with players with low compliance. They noted in conclusion that significant deterioration in team and player adherence to the programme occurred over the season.