ESTIM / NMES/ IFES
Typical Transcutaneous electrical nerve stimulation (TENS) units are intended for temporary pain relief in sore and aching muscles or for symptomatic relief of chronic pain. TENS units are typically limited in functionality.
Interferential current (IFC) electrical stimulation is Intended for symptomatic relief of acute, chronic, and post-traumatic or post-surgical pain. IFC is similar to TENS, but generally more effective and powerful.
Neuromuscular electrical stimulation (NMES) is intended for relaxing muscle spasms, preventing muscle atrophy, increasing blood circulation, maintaining or increasing range of motion, and especially for re-educating the neuromuscular system. NMES is focused on therapeutic use/rehab.