Abstract
Groups of 20 normotensive subjects were assigned to one of three conditions to help them lower their blood pressure: (1) intermittent visual feedback of blood pressure; (2) continuous analogue auditory feedback of frontal EMG; (3) an instructed, no-feedback condition. Both groups receiving feedback showed greater within-session lowering of systolic blood pressure than the no-feedback control group. Although the group receiving intermittent visual feedback of blood pressure lowered blood pressure more than the EMG feedback group at the first session, in three subsequent sessions, the two feedback groups did not differ.
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Blanchard, E.B., Haynes, M.R., Kallman, M.D. et al. A comparison of direct blood pressure feedback and electromyographic feedback on the blood pressure of normotensives. Biofeedback and Self-Regulation 1, 445–451 (1976). https://doi.org/10.1007/BF00998776
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DOI: https://doi.org/10.1007/BF00998776