An electrically-powered device designed to apply an electromagnetic (EM) field to a limb to stimulate healthy muscles, to improve muscle performance and prevent muscle atrophy. It consists of an apparatus with an open chamber into which a patient’s limb is inserted, whereby pulsed stimulation is delivered without causing muscle contraction, stress or strain; it is not designed for deep-tissue stimulation to treat musculoskeletal disorders or body pain. It is intended for use exclusively in a professional setting.