I just read an article on groin injury rehab in a popular journal. The protocol was divided up into warmup, strengthening, sports specific. The warm up got off to a pretty good start- a good combo of different kinds of squats of lunges. However, the remainder was very much muscle tissue focused on hip adduction. Exercises like a seated adduction machine; squats squeezing a ball between the legs.
Most of the exercises in the protocol all seemed to involve a good deal of stabilizing isometric contractions that I'm wondering if they possibly contribute to the neural confusion that causes these injuries in the first place.
Remember the adductors come off the pelvis; and forces coming bottom up from the same side foot, & top down from the opposite leg, torso, and arms also need to be taken into account. It sounds complicated, but it's really not. Trying to piecemeal individual muscles is what makes it seem complicated. Functional science requires the practitioner to think on their feet- the rehab is customized to the athlete and injury.