Effects of intensity of Transcutaneous Electrical Nerve Stimulation (TENS) on pressure pain threshold and blood pressure in healthy humans: A randomized, double-blind, placebo-controlled trial.

Objectives: Transcutaneous electrical nerve stimulation (TENS) is primarily used for pain relief. However, evidence is beginning to emerge that TENS may also have a lowering effect on systemic blood pressure (BP). The purpose of this study was to investigate the comparative effects of 2 intensities on pressure pain threshold (PPT) and resting BP in healthy humans, using low-frequency stimulation applied segmentally to the pain site.