A strained adductor muscle or tendon can be a tenacious, enduring injury, causing a persistent pain in the inner thigh. If a person feels pain high up near the groin, he or she has injured the tendon of one of the four primary adductor muscles: the gracilis, adductor longus, adductor brevis, or adductor Magnus. If the pain is toward the mid-thigh, the muscle fibers are injured. Pain in both places indicates damage to both tendon and muscle fibers.
Hamstring injuries are a common problem that affects a large number of athletes. These injuries can be slow to heal with a very high rate of recurrence or re-injury. Hamstring injuries are often associated with sports that require fast acceleration and deceleration such as running (intervals), football, soccer, handball and rugby.