Читать книгу Musculoskeletal Disorders - Sean Gallagher - Страница 38

Muscle fatigue denotes a transient decrease in the force and power capacity of skeletal muscle activity (Enoka & Duchateau, 2008). Repetitive or sustained contraction of skeletal muscle can lead to a progressive and reversible loss in the ability to produce the desired force (Allen, Lamb, & Westerblad, 2008; Ortenblad, Lunde, Levin, Andersen, & Pedersen, 2000). Myalgia is also known as muscle pain and is a symptom of many diseases and disorders, including prolonged repetitive work (Bongers, Ijmker, Heuvel, & Blatter, 2006; Hadrevi et al., 2019; Sjøgaard, Lundberg, & Kadefors, 2000). Muscle fibrosis is characterized by fibroblast and myofibroblast cell proliferation and excessive accumulation of extracellular matrix proteins in fascial tissues, such as collagen and fibronectin (Contreras, Rebolledo, Oyarzun, Olguin, & Brandan, 2016; Fisher et al., 2015). Muscle fibrosis is also associated with increased muscle pain (Fisher et al., 2015; Pavan, Stecco, Stern, & Stecco, 2014), presumably as a secondary consequence of nerve pain receptors becoming enmeshed in the fibrosing fascial tissues (Fisher et al., 2015; Pavan et al., 2014).