Chronic injuries arise from which mechanisms?

• A. Sudden impact
• B. Viral infection
• C. Overuse and repetitive microtrauma
• D. Hyperextension alone

Answer: (C)

Chronic injuries come from overuse and repetitive microtrauma. When a body part is loaded repeatedly and recovery time isn’t enough, tiny injuries accumulate faster than they can repair. Over time these small tears and tissue changes build up, leading to pain, weakness, and dysfunction. Rest and a gradual, progressive return to activity help tissues adapt and heal, preventing chronic problems. Sudden impact tends to cause acute injuries, and viral infection isn’t the mechanism behind chronic musculoskeletal injuries. Hyperextension by itself can cause injury, but chronic issues mainly arise from ongoing repetitive stress rather than one isolated event.