What type of acute injury occurs in a muscle?

A strain is an acute injury that specifically affects a muscle or a tendon, which is the tissue connecting muscle to bone. It occurs when the muscle fibers are overstretched or torn, often due to excessive force or improper movement during physical activity. This type of injury typically results in pain, swelling, and restricted movement in the affected area, as well as potential bruising.

While a tear is also a type of muscle injury, it is a more general term that can refer to varying degrees of damage, including strains. A sprain refers to injury of a ligament, which connects bones at a joint, and a contusion usually refers to a bruise caused by a direct blow to the muscle tissue. Therefore, a strain is the most accurate term for an acute injury occurring specifically within a muscle.