What is a defining feature of an active trigger point?

An active trigger point is characterized by its ability to cause referred pain, which is pain that is felt in a location different from where the trigger point actually exists. This pain often follows a predictable pattern, radiating to areas of the body that may not be directly related to the source of the pain, helping to identify its presence. Active trigger points are hyperirritable spots within a taut band of skeletal muscle and are typically associated with muscle overuse or injury.

While movement restrictions and restricted range of motion can occur as a result of active trigger points, these features are not defining characteristics. An active trigger point may indeed also lead to movement restrictions; however, the most distinguishing feature is its ability to project pain to other regions in the body. The statement regarding the point not causing pain at rest is incorrect for active trigger points, as they can provoke pain even when the muscle is not in use. Understanding this concept is essential for effective assessment and management of muscular pain syndromes in athletic training.