A method to provide non-invasive neurostimulation to enhance a subject's proficiency in an exercise includes: (a) engaging a subject in an exercise, the subject having no cognitive, physical or emotional impairment with respect to the exercise; (b) providing stimulation of at least one of the subject's trigeminal nerve, facial nerve or hypoglossal nerve by delivering electrical pulses generated by a signal generator to the subject's skin via at least one electrode in contact with the subject's skin, the delivery of electrical pulses being (i) contemporaneously with and independent of the subject's engagement in the exercise, and (ii) independent of the subject's surrounding environment; and (c) repeating steps (a) and (b) on a periodic basis.