Athlete squatting with four-channel, electrical muscle stimulation machine for training, attached through self-adhesive pads to her quadriceps. The impulses are generated by a device and are delivered through electrodes on difference between electronic and electrical devices pdf skin near to the muscles being stimulated. The electrodes are generally pads that adhere to the skin. A number of reviews have looked at the devices.
In EMS training few muscular groups are targeted at the same time, for specific training goals. The FDA rejects certification of devices that claim weight reduction. EMS devices cause a calorie burning that is marginal at best: calories are burnt in significant amount only when most of the body is involved in physical exercise: several muscles, the heart and the respiratory system are all engaged at once. However, some authors imply that EMS can lead to exercise, since people toning their muscles with electrical stimulation are more likely afterwards to participate in sporting activities as the body becomes ready, fit, willing and able to take on physical activity. Strength training by NMES does promote neural and muscular adaptations that are complementary to the well-known effects of voluntary resistance training”. This statement is part of the editorial summary of a 2010 world congress of researchers on the subject. Additional studies on practical applications, which came after that congress, pointed out important factors that make the difference between effective and ineffective EMS.
This in retrospect explains why in the past some researchers and practitioners obtained results that others could not reproduce. Also, as published by reputable universities, EMS causes adaptation, i. EMS, and the modifications induced depend on the pattern of EMS activity. These patterns, referred to as protocols or programs, will cause a different response from contraction of different fiber types. Some programs will improve fatigue resistance, i. During the 19th and 20th centuries, researchers studied and documented the exact electrical properties that generate muscle movement. It was discovered that the body functions induced by electrical stimulation caused long-term changes in the muscles.