“…ACT and related approaches have been widely used in the treatment for chronic pain, (Hann & McCracken, 2014;Simpson, Mars, & Esteves, 2017;Veehof, Trompetter, Bohlmeijer, & Schreurs, 2016), including in people experiencing chronic pain and fatigue in the context of fibromyalgia (Ljótsson et al, 2014;Luciano et al, 2014;Simister et al, 2018;Steiner, Bogusch, & Bigatti, 2013;Wicksell et al, 2013), and for people whose primary complaint is fatigue (Jacobsen, Kallestad, Landrø, Borchgrevink, & Stiles, 2017). In these studies, ACT appears beneficial for a range of outcomes, such as pain, fatigue severity, the functional impact of fatigue, mood, fibromyalgia symptoms and impact, disability, and quality of life.…”