“…Next, during the training phase, individuals in the treatment group receive instruction in the method designed to reduce their cardiovascular response (e.g., cognitive intervention, relaxation, biofeedback) while control participants receive no training. In some investigations, participants have received training while at rest (Blanchard & Young, 1972;Hatch, 1980;Manuck, Levenson, Hinrichsen, & Gryll, 1975), whereas in other studies, training was conducted while participants engaged in a physical or mental task (Larkin, Manuck, & Kasprowicz, 1990;Perski & Engle, 1980;Sirota, Schwartz, & Shapiro, 1974). Finally, in the post-training phase of these studies, participants in both groups are re-exposed to the stressor and a second estimate of cardiovascular responsivity is calculated.…”