80 to 120Hz for acute pain
35-50Hz for muscle stimulation
2 to 10Hz for chronic pain
We have an article describing the placement of a TENS unit, including a section just for TENS Unit Settings and a placement chart, and where we have done additional research to make sure that your TENS unit settings are perfect.
A TENS unit for sciatic nerve pain can relieve tight muscles through multiple electrodes. Specifically, the amplitude, pulse width, and pulse rate can be measured evenly on each item and will give you the recommended determination for your ailment. Pulse width is rated in microseconds from ranges of 10 to 1,000.