... The CAR has also been linked with a range of health outcomes, although the pattern of results has been mixed (e.g., Adam et al., 2006;Chida & Steptoe, 2009;Clow, Hucklebridge, Stalder, Evans, & Thorn, 2010;Gartland et al., 2014;D. B. O'Connor, Walker, Hendrickx, Talbot, & Schaefer, 2013). In terms of psychological stress, a number of studies have found links between stress and increases in the CAR (e.g., De Vugt et al., 2005;Wust, Federenko, Hellhammer, & Kirschbaum, 2000). Conversely, other evidence has shown that chronic stress may disrupt HPA axis regulation and lead to a blunted CAR (e.g., D. B. O'Connor et al., 200 ...