Injuries sustained while engaging in sporting activity. These could be in the form of impact or tissue overload – resulting in hepatoma, strains and sprains (pulls and tears of muscle, tendon or ligament, respectively)
They could also result from compression or displacement of tissue structures within/between joints such as bursa, menisci or discs.
Sports injuries can also be a result of wrong biomechanics, i.e. way the body moves and is aligned. These injuries are more likely to be stubborn. They go away with rest but tend to come back when activity is resumed.
This is because discomfort and pain in these cases are symptomatic of the deeper lying biomechanical neuromuscular issues. This also tends to be the case where treatment is insufficient.
Treatment for cases like this need to be more in-depth, addressing both symptom and cause. Common examples in sport are recurring hamstring strains in runners, footballers or swimmers; knee pain in cyclists, etc.