Which of the following best defines tension in tissue?

Tension in tissue refers specifically to the force that pulls on tissues, which results from pulling or stretching actions. When a force is applied in a way that elongates or pulls the tissue, it creates a tensile load, leading to elongation. This is particularly relevant in the context of muscles, tendons, and ligaments, as they are designed to handle tension. Understanding this concept is vital in athletic training, as it affects how injuries occur and how tissues respond to stress during physical activities.

In contrast, the other options describe different types of forces acting on tissues. A force that stretches tissue beyond its normal capacity describes a situation that can result in injury, particularly if the tissue is not adapted to handle that level of stretch. A force that compresses tissues together refers to compression, which can lead to different types of injuries or conditions. Finally, a force that creates friction in the body pertains to shear forces, which can also contribute to different types of injuries but is not associated with tension. Thus, the definition of tension is accurately captured in the choice relating to the pulling action on tissues.