Psychophysiological and cognitive responses to stressful stimuli in subjects practicing progressive relaxation and clinically standardized meditation

Thirty-six volunteer subjects were assigned to one of three conditions: progressive relaxation, clinically standardized meditation, or a waiting list control group asked to relax daily (without specific instruction). Subjects were given paper and pencil tests two times, separated by 5 weeks during which time the two treatment groups received 4 weekly sessions of group training. All subjects were tested in the psychophysiology laboratory at the end of the 5-week period, during which time they were exposed to 5 very loud tones. While relaxing as deeply as possible using the techniques they had learned and anticipating the loud tones, the meditation group exhibited higher heart rates and higher integrated frontalis EMG activity, but they also showed greater cardiac decelerations following each tone, more frontal alpha, and fewer symptoms of cognitive anxiety than the other two groups. The relaxation group reported more sensations of muscular relaxation than the other groups, but also some symptoms of hyperventilation. The results are generally consistent with Davidson and Schwartz's (1976) categorization of meditation as a ‘cognitive’ technique, and suggest that frontal EEG alpha may be a physiological marker for the absence of cognitive anxiety. Physiological findings also support Goleman and Schwartz's (1976) suggestion that meditation prepares people to cope with stress.