“…Since impaired descending pain modulation is discussed as a possible mechanism in the development of chronic pain (Arendt‐Nielsen et al, 2010; Staud et al, 2003) and in pain chronification (Grosen et al, 2014; Yarnitsky et al, 2008), reliable measures are important in distinguishing between normal fluctuation of subsequent measurements and measuring real progress of disease or treatment response. Reliability of offset analgesia (de Vita et al, 2022; Nilsson et al, 2014) and CPM has been studied with a variety of protocols (de Vita et al, 2022; Gehling et al, 2016; Kennedy et al, 2016; Kennedy et al, 2020; Özgül et al, 2017), and has been reported in many cases to be good to excellent, but also to be highly variable between studies (Kennedy et al, 2016; Vaegter et al, 2018). Influencing factors on CPM or offset effect could include sex and sex hormones, which have also been linked to differential pain perception (Aloisi, 2017; Bartley & Fillingim, 2013; Meyer‐Frießem et al, 2020; Racine et al, 2012), with a special focus on a possible anti‐nociceptive role of testosterone (White & Robinson, 2015).…”