These tend to be due to overuse, or repeated injury over a long period of time, and may be due to over-training, mechanical or postural faults,
or muscle-imbalance.
Such as a sprained ankle, pulled muscles, or back strains occur suddenly during activity.
They are associated with severe, sudden pain, swelling, inability to
move a joint though its full range, weakness, and possibly a visible fracture or dislocation.