Abstract
This study examined the acute effects of relaxation training on salivary cortisol and salivary immunoglobulin A (sIgA). Members of age- and gender-matched undergraduate student pairs were randomly assigned to an experimental or control group. Forty-one experimental subjects were led through Abbreviated Progressive Relaxation Training (APRT) during a 1-h laboratory session; 14 control subjects merely sat quietly in the laboratory for an equal amount of time. All subjects provided pre- and post-intervention saliva samples and self-report data on state anxiety, perceived stress, and relaxation levels. Heart rate was also monitored immediately before and after APRT or quiet sitting. Results indicated that a brief relaxation exercise led to experimental subjects having significantly lower levels of post-intervention salivary cortisol (p = .036) and significantly higher levels of post-intervention sIgA concentration (p < .001) and secretion rate (p < .001) than control subjects. The data suggest that relaxation training may play a role in immunoenhancement.
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