“…Stress‐related sleep problems are common (Altena et al., 2016), and those sensitive to stress‐related sleep disruption are more likely to develop chronic insomnia (Akerstedt, Kecklund, & Axelsson, 2007; Drake, Richardson, Roehrs, Scofield, & Roth, 2004; Ellis, Gehrman, Espie, Riemann, & Perlis, 2012; Gouin et al., 2015). Pre‐existing insomnia is also a major risk factor for developing post‐traumatic stress disorder (PTSD) when exposed to a major stressor (Gehrman et al., 2013), which then in itself is associated with an increase of sleep disruption (Miller, Brownlow, Woodward, & Gehrman, 2017).…”