Sports injuries are mainly classified into two types, acute injury, and chronic (also known as overuse) injury.
Acute injury: Any injury resulting from a sudden accident or trauma is termed an acute injury. The examples include bone fracture, joint dislocation, ligament tear/sprain, muscle tear/strain, cramps, wounds, and abrasion on the skin.
Chronic injury: The injuries occurring from the repetitive and excessive load on the tissues for a long duration of time is called chronic injury. The examples include stress fracture, periostitis, osteoarthritis, inflammation, delayed onset muscle soreness, blisters, and callus.