Final answer:
A "pulled groin" typically involves an injury to the thigh adductors, which are part of the medial compartment of the thigh responsible for adducting the leg towards the body's midline.
Step-by-step explanation:
When a "pulled groin" occurs, the muscle group involved is the thigh adductors. This muscle group is responsible for bringing the leg toward the midline of the body. The medial compartment of the thigh includes the adductors along with the pectineus and the gracilis muscles.
A pulled groin is a strain or tear in one of these adductor muscles and is a common injury among athletes engaging in sports that involve a lot of side-to-side movement or quick changes in direction.