What does 'stress' refer to in relation to tissues?

In the context of tissues, 'stress' refers to the internal resistance that tissues offer when subjected to an external load. When a force is applied to a tissue, it generates internal forces within the tissue that are aimed at counteracting the applied force. This internal resistance can lead to various responses at the cellular and tissue levels, influencing their integrity and functionality.

Understanding 'stress' in this way highlights its importance in assessing how tissues respond to physical challenges, including potential injuries. It also emphasizes the role of biomechanics in the field of athletic training, where knowledge of how tissues behave under stress is critical for injury prevention and rehabilitation strategies. This internal response is key in determining how well the tissue can withstand forces without becoming damaged.