Final answer:
Overuse injuries come under musculoskeletal disorders and have a gradual onset, resulting from repeated biomechanical stresses and not from sudden trauma, viral infections, or a genetic predisposition.
Step-by-step explanation:
The term overuse injuries refers to a category of musculoskeletal disorders that are injury to muscles or tendons caused by biomechanical stresses. These injuries typically are not the result of sudden trauma but rather have a gradual onset due to repetitive motions, prolonged or repeated stress, or maintaining awkward positions for extended periods. Examples include conditions like tendonitis, muscle strains, and carpal tunnel syndrome, which occur when tendons or muscles are overused and sustain microtrauma leading to an inflammatory response. In contrast, viral infections and genetic predisposition are not mechanisms of overuse injuries.