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Summary This study aimed to compare the short-term physiological effects of Mitchell's simple physiological relaxation and Jacobson's progressive relaxation. Twenty-four normotensive subjects, 14 men and ten women, participated in the six-week study. Systolic blood pressure (SBP) and diastolic blood pressure (DBP), respiratory rate (RR) and heart rate (HR) were monitored by conventional methods. Each subject underwent a baseline period to ascertain pre-study parameter values, following which subjects were randomly assigned to three groups. Each group received two 25-minute sessions of each of the relaxation techniques, and two sessions of the control condition of 25 minutes supine lying. The sequence of intervention differed among the three groups. Physiological parameter measurements were taken immediately before and after intervention. Following intervention with simple physiological relaxation, there were significant reductions in SBP and HR (both p |