Electrical Muscle Stimulation (EMS) is a type of muscle building and shaping machine that uses electrical impulses to stimulate muscle contractions. These electrical impulses mimic the natural signals that are sent from the brain to the muscles during physical activity. EMS machines are designed to be used during exercise or as a standalone workout to help build muscle mass, improve strength, and help tone and shape the body.

EMS machines work by sending electrical signals through electrodes that are placed on the skin over the target muscles. The electrical impulses cause the muscles to contract more intensely than they would during a regular workout, which can help to increase muscle mass and strength. EMS machines are often used by athletes and bodybuilders to supplement their regular workout routines, but they can also be used by anyone looking to improve their muscle tone and shape.