![]() Physiologically stressing the tissue, below the level of injury, with sufficient time for adaptation causes cellular response that strengthen the tissue and improves its tolerance. This means that before a patient can return to their sport or activity the injured tissue needs to be exposed to that specific level of load. Exposure to compressive loads, for instance, will qualify the tissue to tolerate the same type of applied loads exclusively. This hypothesis is aligned with a sub-principle of Wolff's law that tissues adapt to the specific applied loads. Regardless of the type of loading, torsional, compressive or tensile, the mechanical stimulus triggers a release of various chemicals which in turn result in building up layers of tissue and improves load tolerance. Increased bone thickness and width in response to mechanical loading is the classical example of this hypothesis. Refers to the conversion of mechanical loads on the cellular level resulting in biochemical signals. Injury may occur due to a high-magnitude stress applied for a brief period, a low-magnitude stress applied for a long duration, and/or a moderate-magnitude stress applied to the tissue many times. The magnitude, time, and direction of stress application determine the overall level of exposure to physical stress. Excessively high levels of stress lead to tissue injury and potential permanent damage. Maintaining tissue tolerance is essential to prevent atrophy, whereas overloading results in hypertrophy. Physical Stress Theory Īccording to Mueller and Maluf, biological tissues adapt to changes in the levels of applied stress. Understanding how tissues respond to physical stress and mechanical loading is helpful in achieving a balance between stabilising an injured tissue and avoiding detraining. While absolute rest and offloading may relieve symptoms, they are associated with negative potentials such as decreased tissue tolerance and increased tissue vulnerability in the future. ![]() The goal of any rehabilitation is to restore function to the greatest degree in the shortest time, helping people return to their function with minimal risk of re-injury. 7.2 Identify all extraneous loads to the injured tissue.7.1.1 How much load can the injured tissues tolerate? (Safe loads).5 The Influence of pain on movement and motor control.
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