When assessing muscle injuries, what does a "strain" typically involve?

A strain typically involves the tearing of muscles or tendons, which connect muscles to bones. When a muscle is subjected to excessive force, it can become overstretched or torn, resulting in a strain. This injury can vary in severity, from mild damage involving stretching of the muscle fibers to more significant injuries where the fibers may partially or completely rupture.

In contrast, the other options describe different types of injuries. Tearing of ligaments refers to a sprain, which affects the connective tissues that link bones to each other rather than muscles. Overstretching of bones is not a common term used in injury assessments, as bones typically fracture under too much pressure rather than stretching. Lastly, fracturing of cartilage pertains to injuries affecting the smooth tissue that cushions joints, which is distinct from strains. Understanding the specific nature of muscle injuries is crucial for accurate diagnosis and appropriate treatment plans.