“…In the case of threat , this response is coupled with vasoconstriction (higher TPR)—which leads to stable, or slightly decreased CO, compared with baseline levels. Challenge, then, implies higher efficiency of the heart in transporting oxygenated blood than threat (Blascovich, 2008; Blascovich & Tomaka, 1996); it predicts better task performance and health (Blascovich, Seery, Mugridge, Norris, & Weisbuch, 2004; Scholl, Moeller, Scheepers, Nuerk, & Sassenberg, 2017; Seery, Weisbuch, Hetenyi, & Blascovich, 2010).…”