- HG: frequency of 50 Hertz (Hz), pulse width of 400 microseconds (μs), rise time and fall time of 2 seconds (s), on:off stimulation, initially with a 1:2 relation in the first week (10s of stimulation and 20s of rest, with the objective to adapt and minimize the effects of muscular fatigue), to be increased to a 1:1 relation in the second week (10s of stimulation of and 10s of rest).