Development and validation of the rest experience scale for adults with chronically fatiguing conditions

Martin Ackah, Ulric S Abonie, Florentina Johanna Hettinga, Katie L Hackett and Vincent Deary

PLOS ONE, 2026, vol. 21, issue 9, 1-21

Abstract: Introduction: Rest is a key component of rehabilitation but remains understudied and underspecified in research and practice, partly due to limited conceptual understanding and comprehensive assessment tools. This gap may hinder the integration of rest advice into physical activity and fatigue management protocols. This study aimed to develop and validate the Multidimensional Rest Experience Scale (MRES) for adults with Chronically Fatiguing Conditions (CFC). Methods: Conducted in three phases, Phase 1 involved MRES development via a modified Delphi method to ensure content validity. Phase 2 included preliminary validation by administering the MRES to a representative sample of adults with CFC to assess construct validity and factor structure. Phase 3 evaluated reliability, examining internal consistency and test-retest reliability. Descriptive and inferential analyses were performed. Results: The Delphi process reached consensus on 25 items. Exploratory factor analysis refined the scale to 22 items with six factors: resting activity, restorative rest, planning and prioritising rest, physical and psychological barriers to rest, emotional response to rest, and risk of under-resting. Resting Activity showed significant positive correlations with Chronic Pain Coping Inventory (CPCI) Rest subscale (r = 0.572, p

Date: 2026
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Persistent link: https://EconPapers.repec.org/RePEc:plo:pone00:0355730

DOI: 10.1371/journal.pone.0355730

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