What Is an EMS Unit?

EMS, or electrical muscle stimulation, units are over-the-counter devices that deliver impulses to your muscles using electrodes. These devices are marketed as ways of building tone and decreasing body fat.

Background

• Physical therapists often use much stronger electrical stimulation devices than those available to consumers to alleviate inflammation and pain in injured tissues. The EMS units you buy over the counter operate on the same concept but provide less stimulation.

Uses

• Some of the uses that manufacturers of EMS units claim the devices have are strengthening muscles after prolonged bed rest, treating incontinence, helping women regain muscle tone after childbirth and building muscle during weight training.

Expert Insight

• According to a study conducted at the University of Wisconsin and published by the National Strength & Conditioning Association, EMS units showed no benefit over traditional strength training techniques.

Risks

• Possible side effects of EMS units include tingling, numbness, irritation and warmth in the area of treatment as well as sleep disturbances and difficulty concentrating, according to the EMS Pain Relief Sanctuary.

Considerations

• In addition to their possible ineffectiveness and risk of side effects, the University of Wisconsin study found the devices are often hard to keep in place during exercise and can hinder movement.