Hegarty RSM, Conner TS, Stebbings S, et al. - This study was undertaken to evaluate whether and how daily fluctuations in psychological variables correspond with changes in fatigue‐related disability in the daily lives of people with inflammatory arthritis to distinguish factors to target in psychological interventions and routine clinical practice. Researchers included a cohort of 143 patients with rheumatoid arthritis (n=97) or ankylosing spondylitis (n=46) in a 10‐day online diary study. The results showed that psychological flexibility variables are directly correlated with fatigue‐related disability in the daily lives of inflammatory arthritis patients. Further study is required to evaluate if interventions that target psychological flexibility are effective at decreasing fatigue‐related disability.