• Carmen Ecija, Patricia Catala, Lilian Velasco, Mª Angeles Pastor-Mira, and Cecilia Peñacoba.
• Department of Psychology, Rey Juan Carlos University, Madrid, Spain.
• Pain Manag Nurs. 2022 Dec 1; 23 (6): 767775767-775.

BackgroundIncreased exercise is a marker of health in fibromyalgia (FM). However, patients frequently avoid physical activity as a way of minimizing the pain they feel. This deprives them of opportunities to obtain positive reinforcement, increasing functional impact.AimsThis study examines the mediating role of depressive symptoms between walking (as physical exercise), functional impact, and pain, at different levels of positive affect (PA) among women with fibromyalgia.DesignCross-sectional correlational study.SettingsMutual aid associations for fibromyalgia in Spain.Participants231 women diagnosed with FM.MethodsModerate mediation analyses were conducted using PROCESS.ResultsFirst, a simple mediation model showed that depression mediated the effect of walking on functional impact, but not on pain. Additionally, the moderated mediated model showed that this effect was significant at medium and high levels of PA, but not when levels of PA were low.ConclusionsProvision of resources focused on positive affect seem to increase the positive effects of walking on functional impact through the reduction of depressive symptoms. Nurses can improve adherence of patients with FM to walking behavior through increasing positive affect.Copyright © 2022 The Authors. Published by Elsevier Inc. All rights reserved.

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