Delivery of electromagnetic charge to muscles

A non-transitory computer-readable medium comprising a plurality of instructions that, when read by a computing system, causes the computing system to perform a method of strengthening, toning, and firming muscle tissues, the method comprising:

• receiving parameters for operation of a magnetic muscle stimulation device comprising a device applicator having a coil positioned in a housing of the device applicator, an axis of the coil substantially perpendicular to an applicator surface of the housing;
• and
• causing, based on the received parameters, an alternating current to flow through a coil of the magnetic muscle stimulation device at a frequency between 30 Hz to 50 Hz and a duty cycle equal to or greater than 35% to generate a continuously pulsed time-varying magnetic field that induces an integrated electric charge/electrical conductivity, per pulse, of between 0.115 millivolt second meters (mV*s*m) to 0.75 mV*s*m across a half plane of tissue having a side edge which is beneath a center of the coil and which is about 140 mm wide and extending to about 100 mm below a skin surface of a patient when an applicator surface of the magnetic muscle stimulation device is positioned substantially on and parallel to the skin surface of the patient.