Acute sports injury occurs instantaneously after external impact or fall by external force once which is beyond the physiological limit obviously,such as muscle and tendon, ligament and other strains, tear or rupture, soft tissue contusion or sprain, fracture, dislocation and so on.

Chronic sports injury belongs to overuse syndrome which is caused overload of the same or similar sports and specific parts of the body by long time .Such as joint strain, fasciitis, syno-vitis, tenosynovitis, bursitis, fatigue periostitis,os-teoporosis, fatigue fracture, etc.