A Meta-Analysis of Randomized Controlled Trials on the Effectiveness of Exercise Intervention in Preventing Sports Injuries

Abstract

Athletes risk injury every day during practice sessions and actual games, with the majority of the affected population being young males. The Centers for Disease Control and Prevention 2011‐2014 report on sport and recreation‐related injuries in the United States has consistently shown the average annual estimate of the millions of dollars spent on sport and recreation injuries. These injuries translate to a significant financial implication for the athlete, the team, the health system, and the public health. We composed a review protocol. We enumerated our inclusion and exclusion criteria, injury definition, and search strategy. We searched PubMed and SPORTDiscus. Then we used Forrest plots for the meta‐analysis of the relevant selected studies. We used various keywords in our search strategy. These included "injury," "sports," "exercise," "prevention," "techniques," and every possible combination of them. Search results showed 2516 hits with our keywords, and we included 20 of those results. Twenty trials, including 19712 individuals with 2855 injuries, were analyzed. Eccentric Training relative risk (RR) of 0.54 (95% CI 0.395 to 0.739 with X2 of p < 0.05) showed that the risk of the injury was decreased by 54% in the intervention group compared to the control group. In the neuromuscular training group, a RR of 0.682 (95% CI 0.621 to 0.749 with X2 of p < 0.001) showed that the risk of the injury was decreased by 68.2% in its intervention group subgroup compared to its control group. Also, the "11" International Federation of Association Football (FIFA) program had a RR of 0.771, indicating that there was a 77.1% decrease in injury by this set of exercises (95% CI 0.728 to 0.816 with X2 of p < 0.05), and this "11" FIFA program also had the most preventative effects. Warm‐up had a RR of 0.843 (95% CI 0.749 to 0.949 with X2 of p < 0.05) and showed small prevention. Strength Training RR of 0.97 (95% CI 0.57 to 1.63 with X2 of p > 0.05) had no preventive effect. Our analysis showed that different exercises have preventive roles in sports injuries. The warm‐up FIFA, neuromuscular training, and eccentric training reduced the risk of injury in the intervention group compared to the control group by a high percentage. At the same time, neuromuscular warm‐up and FIFA 11 dynamic warm‐up also decreased the relative risk of injury in the intervention group. These effects varied among exercise type, injury type, and sport.