Gaining muscle with electrical impulses, fact, or fiction
Periodically one sees an advertisement for an electrical device that supposedly builds muscles or helps someone to lose weight. Without a doubt, some types of electrical stimulation are beneficial, however the gains in the muscles are minuscule. Useful versions of these are seen most often in a physical therapy setting where they are used in the rehab of an injury and after a surgery to help control pain. The tens unit comes immediately to mind.
The repeated shocks produced by these electrical devices can force rapid contractions of the muscles. This repeated stimulation does cause a certain amount of growth in the muscle fibers but even the best of these devices, as used in the medical field, can do only so much. They help to partially stave off muscle atrophy during the rehabilitation.
In order to gain muscle size, strength, and to burn enough calories to lose weight, exercise is a critical part of the equation. Without exercise, these devices are practically useless, especially the ones seen on TV.
One popular, regularly advertised, model found that the stimulation of the major muscles of the abdomen, arms, and legs for up to 45 minutes, three times a week for a full two months produced no significant changes in the participants strength levels, body fat ratio to lean muscle mass, weight , or their overall appearance.
The recommendation from most astute observers is to regularly exercise and follow a sound nutritious diet because getting stronger, bigger, and losing weight does not come with an electrical machine. You actually have to be active and watch what you eat and drink.