Maximum tetanic contraction is caused by the stimulus maintaining the muscles in a constant state of tension. The motor neuron cells in the body's muscles are stimulated to produce an action potential by the electric current. This regular muscle contraction effectively facilitate the development of muscle fibres.

By undergoing such intense contractions, the muscle tissue is forced to adapt and repair itself, becoming stronger and harder. This allows for both muscle growth as well as reduction of fat around that muscle group.

The great benefit of electromagnetic fields is that they can penetrate each part of the body without causing any damage to the structures of your bones, cells, organs and tissues. Through the stimulation of your muscles and blood vessels, electromagnetic therapy can also have the further benefit of activating your cells and cell membranes in order to increase overall electrochemical function.