Figure 2.

Representation of the different exercise-based interventions used to target both ACL injury risk mitigation (upper panel, over the dotted line) and ACL injury reduction (lower panel, under the dotted line), for each study design. The size of the circumferences represents the number of studies including the designated intervention (1 is the smallest, 6 is the biggest). To the right is the outcome measures used to evaluate their effectiveness. ACL—anterior cruciate ligament, BA—balance-based interventions, BLD—bilateral strength differences, CMJ—countermovement jump, COD—change of direction, DJ—drop jump, FMS—functional movement score, MT—mixed-training-based interventions, NRCT—non-randomised studies, PCL—posterior cruciate ligament, RCT—randomised-controlled trials, RT—resistance training-based interventions, TM—technique-modification-based interventions, WU—warm-up-based interventions.